b669917825
Being able to dump the state of the print sub-system especially when taking a bugreport is very useful for bug fixing and observing whether the print system operates properly. bug:10659019 Change-Id: Id098b788f474ab17766966a4563ffdfc0171c76b
526 lines
20 KiB
Java
526 lines
20 KiB
Java
/*
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* Copyright (C) 2013 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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package com.android.server.print;
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import android.Manifest;
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import android.content.BroadcastReceiver;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.pm.PackageManager;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Binder;
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import android.os.Process;
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import android.os.UserHandle;
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import android.print.IPrintClient;
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import android.print.IPrintDocumentAdapter;
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import android.print.IPrintManager;
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import android.print.IPrinterDiscoveryObserver;
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import android.print.PrintAttributes;
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import android.print.PrintJobInfo;
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import android.print.PrinterId;
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import android.provider.Settings;
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import android.util.SparseArray;
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import com.android.internal.content.PackageMonitor;
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import com.android.internal.os.BackgroundThread;
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import java.io.FileDescriptor;
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import java.io.PrintWriter;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Set;
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public final class PrintManagerService extends IPrintManager.Stub {
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private static final char COMPONENT_NAME_SEPARATOR = ':';
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private final Object mLock = new Object();
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private final Context mContext;
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private final SparseArray<UserState> mUserStates = new SparseArray<UserState>();
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private int mCurrentUserId = UserHandle.USER_OWNER;
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public PrintManagerService(Context context) {
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mContext = context;
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registerContentObservers();
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registerBoradcastReceivers();
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}
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public void systemRuning() {
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BackgroundThread.getHandler().post(new Runnable() {
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@Override
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public void run() {
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synchronized (mLock) {
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UserState userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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userState.getSpoolerLocked().start();
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}
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}
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});
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}
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@Override
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public PrintJobInfo print(String printJobName, IPrintClient client,
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IPrintDocumentAdapter documentAdapter, PrintAttributes attributes, int appId,
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int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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final RemotePrintSpooler spooler;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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spooler = userState.getSpoolerLocked();
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return spooler.createPrintJob(printJobName, client, documentAdapter,
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attributes, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public List<PrintJobInfo> getPrintJobInfos(int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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final RemotePrintSpooler spooler;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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spooler = userState.getSpoolerLocked();
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return spooler.getPrintJobInfos(null, PrintJobInfo.STATE_ANY,
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resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public PrintJobInfo getPrintJobInfo(int printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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final RemotePrintSpooler spooler;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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spooler = userState.getSpoolerLocked();
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return spooler.getPrintJobInfo(printJobId, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void cancelPrintJob(int printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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final RemotePrintSpooler spooler;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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spooler = userState.getSpoolerLocked();
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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PrintJobInfo printJobInfo = spooler.getPrintJobInfo(printJobId, resolvedAppId);
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if (printJobInfo == null) {
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return;
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}
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if (printJobInfo.getState() != PrintJobInfo.STATE_FAILED) {
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ComponentName printServiceName = printJobInfo.getPrinterId().getServiceName();
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RemotePrintService printService = null;
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synchronized (mLock) {
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printService = userState.getActiveServicesLocked().get(printServiceName);
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}
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if (printService == null) {
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return;
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}
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printService.onRequestCancelPrintJob(printJobInfo);
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} else {
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// If the print job is failed we do not need cooperation
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// from the print service.
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spooler.setPrintJobState(printJobId, PrintJobInfo.STATE_CANCELED, null);
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}
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void restartPrintJob(int printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final RemotePrintSpooler spooler;
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synchronized (mLock) {
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spooler = getOrCreateUserStateLocked(resolvedUserId).getSpoolerLocked();
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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PrintJobInfo printJobInfo = getPrintJobInfo(printJobId, resolvedAppId, resolvedUserId);
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if (printJobInfo == null || printJobInfo.getState() != PrintJobInfo.STATE_FAILED) {
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return;
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}
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spooler.setPrintJobState(printJobId, PrintJobInfo.STATE_QUEUED, null);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void createPrinterDiscoverySession(IPrinterDiscoveryObserver observer,
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int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.createPrinterDiscoverySession(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void destroyPrinterDiscoverySession(IPrinterDiscoveryObserver observer,
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int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.destroyPrinterDiscoverySession(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void startPrinterDiscovery(IPrinterDiscoveryObserver observer,
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List<PrinterId> priorityList, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.startPrinterDiscovery(observer, priorityList);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void stopPrinterDiscovery(IPrinterDiscoveryObserver observer, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.stopPrinterDiscovery(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void validatePrinters(List<PrinterId> printerIds, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.validatePrinters(printerIds);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void startPrinterStateTracking(PrinterId printerId, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.startPrinterStateTracking(printerId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void stopPrinterStateTracking(PrinterId printerId, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.stopPrinterStateTracking(printerId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
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if (mContext.checkCallingOrSelfPermission(Manifest.permission.DUMP)
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!= PackageManager.PERMISSION_GRANTED) {
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pw.println("Permission Denial: can't dump PrintManager from from pid="
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+ Binder.getCallingPid()
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+ ", uid=" + Binder.getCallingUid());
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return;
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}
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synchronized (mLock) {
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pw.println("PRINT MANAGER STATE (dumpsys print)");
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final int userStateCount = mUserStates.size();
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for (int i = 0; i < userStateCount; i++) {
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UserState userState = mUserStates.get(i);
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userState.dump(fd, pw, "");
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pw.println();
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}
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}
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}
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private void registerContentObservers() {
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final Uri enabledPrintServicesUri = Settings.Secure.getUriFor(
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Settings.Secure.ENABLED_PRINT_SERVICES);
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ContentObserver observer = new ContentObserver(BackgroundThread.getHandler()) {
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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if (enabledPrintServicesUri.equals(uri)) {
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synchronized (mLock) {
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UserState userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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}
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}
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}
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};
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mContext.getContentResolver().registerContentObserver(enabledPrintServicesUri,
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false, observer, UserHandle.USER_ALL);
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}
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private void registerBoradcastReceivers() {
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PackageMonitor monitor = new PackageMonitor() {
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@Override
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public boolean onPackageChanged(String packageName, int uid, String[] components) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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if (packageName.equals(componentName.getPackageName())) {
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userState.updateIfNeededLocked();
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return true;
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}
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}
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}
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return false;
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}
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@Override
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public void onPackageRemoved(String packageName, int uid) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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if (packageName.equals(componentName.getPackageName())) {
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iterator.remove();
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persistComponentNamesToSettingLocked(
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Settings.Secure.ENABLED_PRINT_SERVICES,
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userState.getEnabledServices(), getChangingUserId());
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userState.updateIfNeededLocked();
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return;
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}
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}
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}
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}
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@Override
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public boolean onHandleForceStop(Intent intent, String[] stoppedPackages,
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int uid, boolean doit) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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boolean stoppedSomePackages = false;
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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String componentPackage = componentName.getPackageName();
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for (String stoppedPackage : stoppedPackages) {
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if (componentPackage.equals(stoppedPackage)) {
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if (!doit) {
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return true;
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}
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stoppedSomePackages = true;
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break;
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}
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}
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}
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if (stoppedSomePackages) {
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userState.updateIfNeededLocked();
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}
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return false;
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}
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}
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private void persistComponentNamesToSettingLocked(String settingName,
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Set<ComponentName> componentNames, int userId) {
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StringBuilder builder = new StringBuilder();
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for (ComponentName componentName : componentNames) {
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if (builder.length() > 0) {
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builder.append(COMPONENT_NAME_SEPARATOR);
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}
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builder.append(componentName.flattenToShortString());
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}
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Settings.Secure.putStringForUser(mContext.getContentResolver(),
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settingName, builder.toString(), userId);
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}
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};
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// package changes
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monitor.register(mContext, BackgroundThread.getHandler().getLooper(),
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UserHandle.ALL, true);
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// user changes
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IntentFilter intentFilter = new IntentFilter();
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intentFilter.addAction(Intent.ACTION_USER_SWITCHED);
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mContext.registerReceiverAsUser(new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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String action = intent.getAction();
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if (Intent.ACTION_USER_SWITCHED.equals(action)) {
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switchUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0));
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} else if (Intent.ACTION_USER_REMOVED.equals(action)) {
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removeUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0));
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}
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}
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}, UserHandle.ALL, intentFilter, null, BackgroundThread.getHandler());
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}
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private UserState getCurrentUserStateLocked() {
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return getOrCreateUserStateLocked(mCurrentUserId);
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}
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private UserState getOrCreateUserStateLocked(int userId) {
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UserState userState = mUserStates.get(userId);
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if (userState == null) {
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userState = new UserState(mContext, userId, mLock);
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mUserStates.put(userId, userState);
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}
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return userState;
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}
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private void switchUser(int newUserId) {
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synchronized (mLock) {
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if (newUserId == mCurrentUserId) {
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return;
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}
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mCurrentUserId = newUserId;
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UserState userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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userState.getSpoolerLocked().start();
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}
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}
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private void removeUser(int removedUserId) {
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synchronized (mLock) {
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UserState userState = mUserStates.get(removedUserId);
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if (userState != null) {
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userState.destroyLocked();
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mUserStates.remove(removedUserId);
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}
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}
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}
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private int resolveCallingAppEnforcingPermissions(int appId) {
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final int callingUid = Binder.getCallingUid();
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if (callingUid == 0 || callingUid == Process.SYSTEM_UID
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|| callingUid == Process.SHELL_UID) {
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return appId;
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}
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final int callingAppId = UserHandle.getAppId(callingUid);
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if (appId == callingAppId) {
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return appId;
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}
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if (mContext.checkCallingPermission(
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"com.android.printspooler.permission.ACCESS_ALL_PRINT_JOBS")
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!= PackageManager.PERMISSION_GRANTED) {
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throw new SecurityException("Call from app " + callingAppId + " as app "
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+ appId + " without com.android.printspooler.permission"
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+ ".ACCESS_ALL_PRINT_JOBS");
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}
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return appId;
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}
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private int resolveCallingUserEnforcingPermissions(int userId) {
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final int callingUid = Binder.getCallingUid();
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if (callingUid == 0 || callingUid == Process.SYSTEM_UID
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|| callingUid == Process.SHELL_UID) {
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return userId;
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}
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final int callingUserId = UserHandle.getUserId(callingUid);
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if (callingUserId == userId) {
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return userId;
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}
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if (mContext.checkCallingPermission(Manifest.permission.INTERACT_ACROSS_USERS_FULL)
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!= PackageManager.PERMISSION_GRANTED
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|| mContext.checkCallingPermission(Manifest.permission.INTERACT_ACROSS_USERS)
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!= PackageManager.PERMISSION_GRANTED) {
|
|
if (userId == UserHandle.USER_CURRENT_OR_SELF) {
|
|
return callingUserId;
|
|
}
|
|
throw new SecurityException("Call from user " + callingUserId + " as user "
|
|
+ userId + " without permission INTERACT_ACROSS_USERS or "
|
|
+ "INTERACT_ACROSS_USERS_FULL not allowed.");
|
|
}
|
|
if (userId == UserHandle.USER_CURRENT || userId == UserHandle.USER_CURRENT_OR_SELF) {
|
|
return mCurrentUserId;
|
|
}
|
|
throw new IllegalArgumentException("Calling user can be changed to only "
|
|
+ "UserHandle.USER_CURRENT or UserHandle.USER_CURRENT_OR_SELF.");
|
|
}
|
|
}
|