Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.om; |
| 18 | |
| 19 | import static android.app.AppGlobals.getPackageManager; |
| 20 | import static android.content.Intent.ACTION_PACKAGE_ADDED; |
| 21 | import static android.content.Intent.ACTION_PACKAGE_CHANGED; |
| 22 | import static android.content.Intent.ACTION_PACKAGE_REMOVED; |
| 23 | import static android.content.Intent.ACTION_USER_REMOVED; |
| 24 | import static android.content.pm.PackageManager.SIGNATURE_MATCH; |
| 25 | |
| 26 | import android.annotation.NonNull; |
| 27 | import android.annotation.Nullable; |
| 28 | import android.app.ActivityManager; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 29 | import android.app.IActivityManager; |
| 30 | import android.content.BroadcastReceiver; |
| 31 | import android.content.Context; |
| 32 | import android.content.Intent; |
| 33 | import android.content.IntentFilter; |
| 34 | import android.content.om.IOverlayManager; |
| 35 | import android.content.om.OverlayInfo; |
| 36 | import android.content.pm.IPackageManager; |
| 37 | import android.content.pm.PackageInfo; |
| 38 | import android.content.pm.PackageManagerInternal; |
| 39 | import android.content.pm.UserInfo; |
| 40 | import android.net.Uri; |
| 41 | import android.os.Binder; |
| 42 | import android.os.Environment; |
| 43 | import android.os.IBinder; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 44 | import android.os.RemoteException; |
| 45 | import android.os.ResultReceiver; |
| 46 | import android.os.ShellCallback; |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 47 | import android.os.SystemProperties; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 48 | import android.os.UserHandle; |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 49 | import android.text.TextUtils; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 50 | import android.util.ArrayMap; |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 51 | import android.util.ArraySet; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 52 | import android.util.AtomicFile; |
| 53 | import android.util.Slog; |
| 54 | import android.util.SparseArray; |
| 55 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 56 | import com.android.internal.util.ConcurrentUtils; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 57 | import com.android.server.FgThread; |
| 58 | import com.android.server.IoThread; |
| 59 | import com.android.server.LocalServices; |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 60 | import com.android.server.SystemServerInitThreadPool; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 61 | import com.android.server.SystemService; |
| 62 | import com.android.server.pm.Installer; |
| 63 | import com.android.server.pm.UserManagerService; |
| 64 | |
| 65 | import org.xmlpull.v1.XmlPullParserException; |
| 66 | |
| 67 | import java.io.File; |
| 68 | import java.io.FileDescriptor; |
| 69 | import java.io.FileInputStream; |
| 70 | import java.io.FileOutputStream; |
| 71 | import java.io.IOException; |
| 72 | import java.io.PrintWriter; |
| 73 | import java.util.ArrayList; |
| 74 | import java.util.Collections; |
| 75 | import java.util.HashMap; |
| 76 | import java.util.List; |
| 77 | import java.util.Map; |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 78 | import java.util.Set; |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 79 | import java.util.concurrent.Future; |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 80 | import java.util.concurrent.atomic.AtomicBoolean; |
| 81 | |
| 82 | /** |
| 83 | * Service to manage asset overlays. |
| 84 | * |
| 85 | * <p>Asset overlays are additional resources that come from apks loaded |
| 86 | * alongside the system and app apks. This service, the OverlayManagerService |
| 87 | * (OMS), tracks which installed overlays to use and provides methods to change |
| 88 | * this. Changes propagate to running applications as part of the Activity |
| 89 | * lifecycle. This allows Activities to reread their resources at a well |
| 90 | * defined point.</p> |
| 91 | * |
| 92 | * <p>By itself, the OMS will not change what overlays should be active. |
| 93 | * Instead, it is only responsible for making sure that overlays *can* be used |
| 94 | * from a technical and security point of view and to activate overlays in |
| 95 | * response to external requests. The responsibility to toggle overlays on and |
| 96 | * off lies within components that implement different use-cases such as themes |
| 97 | * or dynamic customization.</p> |
| 98 | * |
| 99 | * <p>The OMS receives input from three sources:</p> |
| 100 | * |
| 101 | * <ul> |
| 102 | * <li>Callbacks from the SystemService class, specifically when the |
| 103 | * Android framework is booting and when the end user switches Android |
| 104 | * users.</li> |
| 105 | * |
| 106 | * <li>Intents from the PackageManagerService (PMS). Overlays are regular |
| 107 | * apks, and whenever a package is installed (or removed, or has a |
| 108 | * component enabled or disabled), the PMS broadcasts this as an intent. |
| 109 | * When the OMS receives one of these intents, it updates its internal |
| 110 | * representation of the available overlays and, if there was a visible |
| 111 | * change, triggers an asset refresh in the affected apps.</li> |
| 112 | * |
| 113 | * <li>External requests via the {@link IOverlayManager AIDL interface}. |
| 114 | * The interface allows clients to read information about the currently |
| 115 | * available overlays, change whether an overlay should be used or not, and |
| 116 | * change the relative order in which overlay packages are loaded. |
| 117 | * Read-access is granted if the request targets the same Android user as |
| 118 | * the caller runs as, or if the caller holds the |
| 119 | * INTERACT_ACROSS_USERS_FULL permission. Write-access is granted if the |
| 120 | * caller is granted read-access and additionaly holds the |
| 121 | * CHANGE_OVERLAY_PACKAGES permission.</li> |
| 122 | * </ul> |
| 123 | * |
| 124 | * <p>The AIDL interface works with String package names, int user IDs, and |
| 125 | * {@link OverlayInfo} objects. OverlayInfo instances are used to track a |
| 126 | * specific pair of target and overlay packages and include information such as |
| 127 | * the current state of the overlay. OverlayInfo objects are immutable.</p> |
| 128 | * |
| 129 | * <p>Internally, OverlayInfo objects are maintained by the |
| 130 | * OverlayManagerSettings class. The OMS and its helper classes are notified of |
| 131 | * changes to the settings by the OverlayManagerSettings.ChangeListener |
| 132 | * callback interface. The file /data/system/overlays.xml is used to persist |
| 133 | * the settings.</p> |
| 134 | * |
| 135 | * <p>Creation and deletion of idmap files are handled by the IdmapManager |
| 136 | * class.</p> |
| 137 | * |
| 138 | * <p>The following is an overview of OMS and its related classes. Note how box |
| 139 | * (2) does the heavy lifting, box (1) interacts with the Android framework, |
| 140 | * and box (3) replaces box (1) during unit testing.</p> |
| 141 | * |
| 142 | * <pre> |
| 143 | * Android framework |
| 144 | * | ^ |
| 145 | * . . . | . . . . | . . . . |
| 146 | * . | | . |
| 147 | * . AIDL, broadcasts . |
| 148 | * . intents | . |
| 149 | * . | | . . . . . . . . . . . . |
| 150 | * . v | . . |
| 151 | * . OverlayManagerService . OverlayManagerTests . |
| 152 | * . \ . / . |
| 153 | * . (1) \ . / (3) . |
| 154 | * . . . . . . . . . . \ . . . / . . . . . . . . . |
| 155 | * . \ / . |
| 156 | * . (2) \ / . |
| 157 | * . OverlayManagerServiceImpl . |
| 158 | * . | | . |
| 159 | * . | | . |
| 160 | * . OverlayManagerSettings IdmapManager . |
| 161 | * . . |
| 162 | * . . . . . . . . . . . . . . . . . . . . . . |
| 163 | * </pre> |
| 164 | * |
| 165 | * <p>Finally, here is a list of keywords used in the OMS context.</p> |
| 166 | * |
| 167 | * <ul> |
| 168 | * <li><b>target [package]</b> -- A regular apk that may have its resource |
| 169 | * pool extended by zero or more overlay packages.</li> |
| 170 | * |
| 171 | * <li><b>overlay [package]</b> -- An apk that provides additional |
| 172 | * resources to another apk.</li> |
| 173 | * |
| 174 | * <li><b>OMS</b> -- The OverlayManagerService, i.e. this class.</li> |
| 175 | * |
| 176 | * <li><b>approved</b> -- An overlay is approved if the OMS has verified |
| 177 | * that it can be used technically speaking (its target package is |
| 178 | * installed, at least one resource name in both packages match, the |
| 179 | * idmap was created, etc) and that it is secure to do so. External |
| 180 | * clients can not change this state.</li> |
| 181 | * |
| 182 | * <li><b>not approved</b> -- The opposite of approved.</li> |
| 183 | * |
| 184 | * <li><b>enabled</b> -- An overlay currently in active use and thus part |
| 185 | * of resource lookups. This requires the overlay to be approved. Only |
| 186 | * external clients can change this state.</li> |
| 187 | * |
| 188 | * <li><b>disabled</b> -- The opposite of enabled.</li> |
| 189 | * |
| 190 | * <li><b>idmap</b> -- A mapping of resource IDs between target and overlay |
| 191 | * used during resource lookup. Also the name of the binary that creates |
| 192 | * the mapping.</li> |
| 193 | * </ul> |
| 194 | */ |
| 195 | public final class OverlayManagerService extends SystemService { |
| 196 | |
| 197 | static final String TAG = "OverlayManager"; |
| 198 | |
| 199 | static final boolean DEBUG = false; |
| 200 | |
| 201 | static final String PERMISSION_DENIED = "Operation not permitted for user shell"; |
| 202 | |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 203 | /** |
| 204 | * The system property that specifies the default overlays to apply. |
| 205 | * This is a semicolon separated list of package names. |
| 206 | * |
| 207 | * Ex: com.android.vendor.overlay_one;com.android.vendor.overlay_two |
| 208 | */ |
| 209 | private static final String DEFAULT_OVERLAYS_PROP = "ro.boot.vendor.overlay.theme"; |
| 210 | |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 211 | private final Object mLock = new Object(); |
| 212 | |
| 213 | private final AtomicFile mSettingsFile; |
| 214 | |
| 215 | private final PackageManagerHelper mPackageManager; |
| 216 | |
| 217 | private final UserManagerService mUserManager; |
| 218 | |
| 219 | private final OverlayManagerSettings mSettings; |
| 220 | |
| 221 | private final OverlayManagerServiceImpl mImpl; |
| 222 | |
| 223 | private final AtomicBoolean mPersistSettingsScheduled = new AtomicBoolean(false); |
| 224 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 225 | private Future<?> mInitCompleteSignal; |
| 226 | |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 227 | public OverlayManagerService(@NonNull final Context context, |
| 228 | @NonNull final Installer installer) { |
| 229 | super(context); |
| 230 | mSettingsFile = |
| 231 | new AtomicFile(new File(Environment.getDataSystemDirectory(), "overlays.xml")); |
| 232 | mPackageManager = new PackageManagerHelper(); |
| 233 | mUserManager = UserManagerService.getInstance(); |
| 234 | IdmapManager im = new IdmapManager(installer); |
| 235 | mSettings = new OverlayManagerSettings(); |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 236 | mImpl = new OverlayManagerServiceImpl(mPackageManager, im, mSettings, |
| 237 | getDefaultOverlayPackages()); |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 238 | mInitCompleteSignal = SystemServerInitThreadPool.get().submit(() -> { |
| 239 | final IntentFilter packageFilter = new IntentFilter(); |
| 240 | packageFilter.addAction(ACTION_PACKAGE_ADDED); |
| 241 | packageFilter.addAction(ACTION_PACKAGE_CHANGED); |
| 242 | packageFilter.addAction(ACTION_PACKAGE_REMOVED); |
| 243 | packageFilter.addDataScheme("package"); |
| 244 | getContext().registerReceiverAsUser(new PackageReceiver(), UserHandle.ALL, |
| 245 | packageFilter, null, null); |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 246 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 247 | final IntentFilter userFilter = new IntentFilter(); |
| 248 | userFilter.addAction(ACTION_USER_REMOVED); |
| 249 | getContext().registerReceiverAsUser(new UserReceiver(), UserHandle.ALL, |
| 250 | userFilter, null, null); |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 251 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 252 | restoreSettings(); |
| 253 | onSwitchUser(UserHandle.USER_SYSTEM); |
| 254 | schedulePersistSettings(); |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 255 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 256 | mSettings.addChangeListener(new OverlayChangeListener()); |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 257 | |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 258 | publishBinderService(Context.OVERLAY_SERVICE, mService); |
| 259 | publishLocalService(OverlayManagerService.class, this); |
| 260 | }, "Init OverlayManagerService"); |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | @Override |
| 264 | public void onStart() { |
| 265 | // Intentionally left empty. |
| 266 | } |
| 267 | |
| 268 | @Override |
Fyodor Kupolov | 94ab1a6 | 2017-03-06 14:28:20 -0800 | [diff] [blame^] | 269 | public void onBootPhase(int phase) { |
| 270 | if (phase == PHASE_SYSTEM_SERVICES_READY) { |
| 271 | ConcurrentUtils.waitForFutureNoInterrupt(mInitCompleteSignal, |
| 272 | "Wait for OverlayManagerService init"); |
| 273 | mInitCompleteSignal = null; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | @Override |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 278 | public void onSwitchUser(final int newUserId) { |
| 279 | // ensure overlays in the settings are up-to-date, and propagate |
| 280 | // any asset changes to the rest of the system |
| 281 | final List<String> targets; |
| 282 | synchronized (mLock) { |
| 283 | targets = mImpl.onSwitchUser(newUserId); |
| 284 | } |
| 285 | updateAssets(newUserId, targets); |
| 286 | } |
| 287 | |
Adam Lesinski | a5ca624 | 2017-03-01 15:45:12 -0800 | [diff] [blame] | 288 | private static Set<String> getDefaultOverlayPackages() { |
| 289 | final String str = SystemProperties.get(DEFAULT_OVERLAYS_PROP); |
| 290 | if (TextUtils.isEmpty(str)) { |
| 291 | return Collections.emptySet(); |
| 292 | } |
| 293 | |
| 294 | final ArraySet<String> defaultPackages = new ArraySet<>(); |
| 295 | for (String packageName : str.split(";")) { |
| 296 | if (!TextUtils.isEmpty(packageName)) { |
| 297 | defaultPackages.add(packageName); |
| 298 | } |
| 299 | } |
| 300 | return defaultPackages; |
| 301 | } |
| 302 | |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 303 | private final class PackageReceiver extends BroadcastReceiver { |
| 304 | @Override |
| 305 | public void onReceive(@NonNull final Context context, @NonNull final Intent intent) { |
| 306 | final Uri data = intent.getData(); |
| 307 | if (data == null) { |
| 308 | Slog.e(TAG, "Cannot handle package broadcast with null data"); |
| 309 | return; |
| 310 | } |
| 311 | final String packageName = data.getSchemeSpecificPart(); |
| 312 | |
| 313 | final boolean replacing = intent.getBooleanExtra(Intent.EXTRA_REPLACING, false); |
| 314 | |
| 315 | final int[] userIds; |
| 316 | final int extraUid = intent.getIntExtra(Intent.EXTRA_UID, UserHandle.USER_NULL); |
| 317 | if (extraUid == UserHandle.USER_NULL) { |
| 318 | userIds = mUserManager.getUserIds(); |
| 319 | } else { |
| 320 | userIds = new int[] { UserHandle.getUserId(extraUid) }; |
| 321 | } |
| 322 | |
| 323 | switch (intent.getAction()) { |
| 324 | case ACTION_PACKAGE_ADDED: |
| 325 | if (replacing) { |
| 326 | onPackageUpgraded(packageName, userIds); |
| 327 | } else { |
| 328 | onPackageAdded(packageName, userIds); |
| 329 | } |
| 330 | break; |
| 331 | case ACTION_PACKAGE_CHANGED: |
| 332 | onPackageChanged(packageName, userIds); |
| 333 | break; |
| 334 | case ACTION_PACKAGE_REMOVED: |
| 335 | if (replacing) { |
| 336 | onPackageUpgrading(packageName, userIds); |
| 337 | } else { |
| 338 | onPackageRemoved(packageName, userIds); |
| 339 | } |
| 340 | break; |
| 341 | default: |
| 342 | // do nothing |
| 343 | break; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | private void onPackageAdded(@NonNull final String packageName, |
| 348 | @NonNull final int[] userIds) { |
| 349 | for (final int userId : userIds) { |
| 350 | synchronized (mLock) { |
| 351 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 352 | if (pi != null) { |
| 353 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 354 | if (!isOverlayPackage(pi)) { |
| 355 | mImpl.onTargetPackageAdded(packageName, userId); |
| 356 | } else { |
| 357 | mImpl.onOverlayPackageAdded(packageName, userId); |
| 358 | } |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | private void onPackageChanged(@NonNull final String packageName, |
| 365 | @NonNull final int[] userIds) { |
| 366 | for (int userId : userIds) { |
| 367 | synchronized (mLock) { |
| 368 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 369 | if (pi != null) { |
| 370 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 371 | if (!isOverlayPackage(pi)) { |
| 372 | mImpl.onTargetPackageChanged(packageName, userId); |
| 373 | } else { |
| 374 | mImpl.onOverlayPackageChanged(packageName, userId); |
| 375 | } |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | private void onPackageUpgrading(@NonNull final String packageName, |
| 382 | @NonNull final int[] userIds) { |
| 383 | for (int userId : userIds) { |
| 384 | synchronized (mLock) { |
| 385 | mPackageManager.forgetPackageInfo(packageName, userId); |
| 386 | final OverlayInfo oi = mImpl.getOverlayInfo(packageName, userId); |
| 387 | if (oi == null) { |
| 388 | mImpl.onTargetPackageUpgrading(packageName, userId); |
| 389 | } else { |
| 390 | mImpl.onOverlayPackageUpgrading(packageName, userId); |
| 391 | } |
| 392 | } |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | private void onPackageUpgraded(@NonNull final String packageName, |
| 397 | @NonNull final int[] userIds) { |
| 398 | for (int userId : userIds) { |
| 399 | synchronized (mLock) { |
| 400 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 401 | if (pi != null) { |
| 402 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 403 | if (!isOverlayPackage(pi)) { |
| 404 | mImpl.onTargetPackageUpgraded(packageName, userId); |
| 405 | } else { |
| 406 | mImpl.onOverlayPackageUpgraded(packageName, userId); |
| 407 | } |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | private void onPackageRemoved(@NonNull final String packageName, |
| 414 | @NonNull final int[] userIds) { |
| 415 | for (int userId : userIds) { |
| 416 | synchronized (mLock) { |
| 417 | mPackageManager.forgetPackageInfo(packageName, userId); |
| 418 | final OverlayInfo oi = mImpl.getOverlayInfo(packageName, userId); |
| 419 | if (oi == null) { |
| 420 | mImpl.onTargetPackageRemoved(packageName, userId); |
| 421 | } else { |
| 422 | mImpl.onOverlayPackageRemoved(packageName, userId); |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | private final class UserReceiver extends BroadcastReceiver { |
| 430 | @Override |
| 431 | public void onReceive(@NonNull final Context context, @NonNull final Intent intent) { |
| 432 | switch (intent.getAction()) { |
| 433 | case ACTION_USER_REMOVED: |
| 434 | final int userId = |
| 435 | intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); |
| 436 | if (userId != UserHandle.USER_NULL) { |
| 437 | synchronized (mLock) { |
| 438 | mImpl.onUserRemoved(userId); |
| 439 | mPackageManager.forgetAllPackageInfos(userId); |
| 440 | } |
| 441 | } |
| 442 | break; |
| 443 | default: |
| 444 | // do nothing |
| 445 | break; |
| 446 | } |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | private final IBinder mService = new IOverlayManager.Stub() { |
| 451 | @Override |
| 452 | public Map<String, List<OverlayInfo>> getAllOverlays(int userId) |
| 453 | throws RemoteException { |
| 454 | userId = handleIncomingUser(userId, "getAllOverlays"); |
| 455 | |
| 456 | synchronized (mLock) { |
| 457 | return mImpl.getOverlaysForUser(userId); |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | @Override |
| 462 | public List<OverlayInfo> getOverlayInfosForTarget(@Nullable final String targetPackageName, |
| 463 | int userId) throws RemoteException { |
| 464 | userId = handleIncomingUser(userId, "getOverlayInfosForTarget"); |
| 465 | if (targetPackageName == null) { |
| 466 | return Collections.emptyList(); |
| 467 | } |
| 468 | |
| 469 | synchronized (mLock) { |
| 470 | return mImpl.getOverlayInfosForTarget(targetPackageName, userId); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | @Override |
| 475 | public OverlayInfo getOverlayInfo(@Nullable final String packageName, |
| 476 | int userId) throws RemoteException { |
| 477 | userId = handleIncomingUser(userId, "getOverlayInfo"); |
| 478 | if (packageName == null) { |
| 479 | return null; |
| 480 | } |
| 481 | |
| 482 | synchronized (mLock) { |
| 483 | return mImpl.getOverlayInfo(packageName, userId); |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | @Override |
| 488 | public boolean setEnabled(@Nullable final String packageName, final boolean enable, |
| 489 | int userId) throws RemoteException { |
| 490 | enforceChangeOverlayPackagesPermission("setEnabled"); |
| 491 | userId = handleIncomingUser(userId, "setEnabled"); |
| 492 | if (packageName == null) { |
| 493 | return false; |
| 494 | } |
| 495 | |
| 496 | final long ident = Binder.clearCallingIdentity(); |
| 497 | try { |
| 498 | synchronized (mLock) { |
| 499 | return mImpl.setEnabled(packageName, enable, userId); |
| 500 | } |
| 501 | } finally { |
| 502 | Binder.restoreCallingIdentity(ident); |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | @Override |
| 507 | public boolean setPriority(@Nullable final String packageName, |
| 508 | @Nullable final String parentPackageName, int userId) throws RemoteException { |
| 509 | enforceChangeOverlayPackagesPermission("setPriority"); |
| 510 | userId = handleIncomingUser(userId, "setPriority"); |
| 511 | if (packageName == null || parentPackageName == null) { |
| 512 | return false; |
| 513 | } |
| 514 | |
| 515 | final long ident = Binder.clearCallingIdentity(); |
| 516 | try { |
| 517 | synchronized (mLock) { |
| 518 | return mImpl.setPriority(packageName, parentPackageName, userId); |
| 519 | } |
| 520 | } finally { |
| 521 | Binder.restoreCallingIdentity(ident); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | @Override |
| 526 | public boolean setHighestPriority(@Nullable final String packageName, int userId) |
| 527 | throws RemoteException { |
| 528 | enforceChangeOverlayPackagesPermission("setHighestPriority"); |
| 529 | userId = handleIncomingUser(userId, "setHighestPriority"); |
| 530 | if (packageName == null) { |
| 531 | return false; |
| 532 | } |
| 533 | |
| 534 | final long ident = Binder.clearCallingIdentity(); |
| 535 | try { |
| 536 | synchronized (mLock) { |
| 537 | return mImpl.setHighestPriority(packageName, userId); |
| 538 | } |
| 539 | } finally { |
| 540 | Binder.restoreCallingIdentity(ident); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | @Override |
| 545 | public boolean setLowestPriority(@Nullable final String packageName, int userId) |
| 546 | throws RemoteException { |
| 547 | enforceChangeOverlayPackagesPermission("setLowestPriority"); |
| 548 | userId = handleIncomingUser(userId, "setLowestPriority"); |
| 549 | if (packageName == null) { |
| 550 | return false; |
| 551 | } |
| 552 | |
| 553 | final long ident = Binder.clearCallingIdentity(); |
| 554 | try { |
| 555 | synchronized (mLock) { |
| 556 | return mImpl.setLowestPriority(packageName, userId); |
| 557 | } |
| 558 | } finally { |
| 559 | Binder.restoreCallingIdentity(ident); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | @Override |
| 564 | public void onShellCommand(@NonNull final FileDescriptor in, |
| 565 | @NonNull final FileDescriptor out, @NonNull final FileDescriptor err, |
| 566 | @NonNull final String[] args, @NonNull final ShellCallback callback, |
| 567 | @NonNull final ResultReceiver resultReceiver) { |
| 568 | (new OverlayManagerShellCommand(this)).exec( |
| 569 | this, in, out, err, args, callback, resultReceiver); |
| 570 | } |
| 571 | |
| 572 | @Override |
| 573 | protected void dump(@NonNull final FileDescriptor fd, @NonNull final PrintWriter pw, |
| 574 | @NonNull final String[] argv) { |
| 575 | enforceDumpPermission("dump"); |
| 576 | |
| 577 | final boolean verbose = argv.length > 0 && "--verbose".equals(argv[0]); |
| 578 | |
| 579 | synchronized (mLock) { |
| 580 | mImpl.onDump(pw); |
| 581 | mPackageManager.dump(pw, verbose); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * Ensure that the caller has permission to interact with the given userId. |
| 587 | * If the calling user is not the same as the provided user, the caller needs |
| 588 | * to hold the INTERACT_ACROSS_USERS_FULL permission (or be system uid or |
| 589 | * root). |
| 590 | * |
| 591 | * @param userId the user to interact with |
| 592 | * @param message message for any SecurityException |
| 593 | */ |
| 594 | private int handleIncomingUser(final int userId, @NonNull final String message) { |
| 595 | return ActivityManager.handleIncomingUser(Binder.getCallingPid(), |
| 596 | Binder.getCallingUid(), userId, false, true, message, null); |
| 597 | } |
| 598 | |
| 599 | /** |
| 600 | * Enforce that the caller holds the CHANGE_OVERLAY_PACKAGES permission (or is |
| 601 | * system or root). |
| 602 | * |
| 603 | * @param message used as message if SecurityException is thrown |
| 604 | * @throws SecurityException if the permission check fails |
| 605 | */ |
| 606 | private void enforceChangeOverlayPackagesPermission(@NonNull final String message) { |
| 607 | getContext().enforceCallingOrSelfPermission( |
| 608 | android.Manifest.permission.CHANGE_OVERLAY_PACKAGES, message); |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * Enforce that the caller holds the DUMP permission (or is system or root). |
| 613 | * |
| 614 | * @param message used as message if SecurityException is thrown |
| 615 | * @throws SecurityException if the permission check fails |
| 616 | */ |
| 617 | private void enforceDumpPermission(@NonNull final String message) { |
| 618 | getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, |
| 619 | message); |
| 620 | } |
| 621 | }; |
| 622 | |
| 623 | private boolean isOverlayPackage(@NonNull final PackageInfo pi) { |
| 624 | return pi != null && pi.overlayTarget != null; |
| 625 | } |
| 626 | |
| 627 | private final class OverlayChangeListener implements OverlayManagerSettings.ChangeListener { |
| 628 | @Override |
| 629 | public void onSettingsChanged() { |
| 630 | schedulePersistSettings(); |
| 631 | } |
| 632 | |
| 633 | @Override |
| 634 | public void onOverlayAdded(@NonNull final OverlayInfo oi) { |
| 635 | scheduleBroadcast(Intent.ACTION_OVERLAY_ADDED, oi, oi.isEnabled()); |
| 636 | } |
| 637 | |
| 638 | @Override |
| 639 | public void onOverlayRemoved(@NonNull final OverlayInfo oi) { |
| 640 | scheduleBroadcast(Intent.ACTION_OVERLAY_REMOVED, oi, oi.isEnabled()); |
| 641 | } |
| 642 | |
| 643 | @Override |
| 644 | public void onOverlayChanged(@NonNull final OverlayInfo oi, |
| 645 | @NonNull final OverlayInfo oldOi) { |
| 646 | scheduleBroadcast(Intent.ACTION_OVERLAY_CHANGED, oi, oi.isEnabled() != oldOi.isEnabled()); |
| 647 | } |
| 648 | |
| 649 | @Override |
| 650 | public void onOverlayPriorityChanged(@NonNull final OverlayInfo oi) { |
| 651 | scheduleBroadcast(Intent.ACTION_OVERLAY_PRIORITY_CHANGED, oi, oi.isEnabled()); |
| 652 | } |
| 653 | |
| 654 | private void scheduleBroadcast(@NonNull final String action, @NonNull final OverlayInfo oi, |
| 655 | final boolean doUpdate) { |
| 656 | FgThread.getHandler().post(new BroadcastRunnable(action, oi, doUpdate)); |
| 657 | } |
| 658 | |
| 659 | private final class BroadcastRunnable implements Runnable { |
| 660 | private final String mAction; |
| 661 | private final OverlayInfo mOverlayInfo; |
| 662 | private final boolean mDoUpdate; |
| 663 | |
| 664 | BroadcastRunnable(@NonNull final String action, @NonNull final OverlayInfo oi, |
| 665 | final boolean doUpdate) { |
| 666 | mAction = action; |
| 667 | mOverlayInfo = oi; |
| 668 | mDoUpdate = doUpdate; |
| 669 | } |
| 670 | |
| 671 | @Override |
| 672 | public void run() { |
| 673 | if (mDoUpdate) { |
| 674 | updateAssets(mOverlayInfo.userId, mOverlayInfo.targetPackageName); |
| 675 | } |
| 676 | sendBroadcast(mAction, mOverlayInfo.targetPackageName, mOverlayInfo.packageName, |
| 677 | mOverlayInfo.userId); |
| 678 | } |
| 679 | |
| 680 | private void sendBroadcast(@NonNull final String action, |
| 681 | @NonNull final String targetPackageName, @NonNull final String packageName, |
| 682 | final int userId) { |
| 683 | final Intent intent = new Intent(action, Uri.fromParts("package", |
| 684 | String.format("%s/%s", targetPackageName, packageName), null)); |
| 685 | intent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); |
| 686 | if (DEBUG) { |
| 687 | Slog.d(TAG, String.format("send broadcast %s", intent)); |
| 688 | } |
| 689 | try { |
Mårten Kongstad | 2e0d0f3 | 2016-06-02 09:35:31 +0200 | [diff] [blame] | 690 | ActivityManager.getService().broadcastIntent(null, intent, null, null, 0, |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 691 | null, null, null, android.app.AppOpsManager.OP_NONE, null, false, false, |
| 692 | userId); |
| 693 | } catch (RemoteException e) { |
| 694 | // Intentionally left empty. |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | private void updateAssets(final int userId, final String targetPackageName) { |
| 702 | final List<String> list = new ArrayList<>(); |
| 703 | list.add(targetPackageName); |
| 704 | updateAssets(userId, list); |
| 705 | } |
| 706 | |
| 707 | private void updateAssets(final int userId, List<String> targetPackageNames) { |
Mårten Kongstad | 2e0d0f3 | 2016-06-02 09:35:31 +0200 | [diff] [blame] | 708 | final PackageManagerInternal pm = LocalServices.getService(PackageManagerInternal.class); |
| 709 | final boolean updateFrameworkRes = targetPackageNames.contains("android"); |
| 710 | if (updateFrameworkRes) { |
| 711 | targetPackageNames = pm.getTargetPackageNames(userId); |
| 712 | } |
| 713 | |
| 714 | final Map<String, List<String>> pendingChanges = new ArrayMap<>(targetPackageNames.size()); |
| 715 | synchronized (mLock) { |
| 716 | final int N = targetPackageNames.size(); |
| 717 | for (int i = 0; i < N; i++) { |
| 718 | final String targetPackageName = targetPackageNames.get(i); |
| 719 | pendingChanges.put(targetPackageName, |
| 720 | mImpl.getEnabledOverlayPackageNames(targetPackageName, userId)); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | final int N = targetPackageNames.size(); |
| 725 | for (int i = 0; i < N; i++) { |
| 726 | final String targetPackageName = targetPackageNames.get(i); |
| 727 | if (!pm.setEnabledOverlayPackages( |
| 728 | userId, targetPackageName, pendingChanges.get(targetPackageName))) { |
| 729 | Slog.e(TAG, String.format("Failed to change enabled overlays for %s user %d", |
| 730 | targetPackageName, userId)); |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | final IActivityManager am = ActivityManager.getService(); |
| 735 | try { |
| 736 | am.scheduleApplicationInfoChanged(targetPackageNames, userId); |
| 737 | } catch (RemoteException e) { |
| 738 | // Intentionally left empty. |
| 739 | } |
Mårten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | private void schedulePersistSettings() { |
| 743 | if (mPersistSettingsScheduled.getAndSet(true)) { |
| 744 | return; |
| 745 | } |
| 746 | IoThread.getHandler().post(new Runnable() { |
| 747 | @Override |
| 748 | public void run() { |
| 749 | mPersistSettingsScheduled.set(false); |
| 750 | synchronized (mLock) { |
| 751 | FileOutputStream stream = null; |
| 752 | try { |
| 753 | stream = mSettingsFile.startWrite(); |
| 754 | mSettings.persist(stream); |
| 755 | mSettingsFile.finishWrite(stream); |
| 756 | } catch (IOException | XmlPullParserException e) { |
| 757 | mSettingsFile.failWrite(stream); |
| 758 | Slog.e(TAG, "failed to persist overlay state", e); |
| 759 | } |
| 760 | } |
| 761 | } |
| 762 | }); |
| 763 | } |
| 764 | |
| 765 | private void restoreSettings() { |
| 766 | synchronized (mLock) { |
| 767 | if (!mSettingsFile.getBaseFile().exists()) { |
| 768 | return; |
| 769 | } |
| 770 | try (final FileInputStream stream = mSettingsFile.openRead()) { |
| 771 | mSettings.restore(stream); |
| 772 | |
| 773 | // We might have data for dying users if the device was |
| 774 | // restarted before we received USER_REMOVED. Remove data for |
| 775 | // users that will not exist after the system is ready. |
| 776 | |
| 777 | final List<UserInfo> deadUsers = getDeadUsers(); |
| 778 | final int N = deadUsers.size(); |
| 779 | for (int i = 0; i < N; i++) { |
| 780 | final UserInfo deadUser = deadUsers.get(i); |
| 781 | final int userId = deadUser.getUserHandle().getIdentifier(); |
| 782 | mSettings.removeUser(userId); |
| 783 | } |
| 784 | } catch (IOException | XmlPullParserException e) { |
| 785 | Slog.e(TAG, "failed to restore overlay state", e); |
| 786 | } |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | private List<UserInfo> getDeadUsers() { |
| 791 | final List<UserInfo> users = mUserManager.getUsers(false); |
| 792 | final List<UserInfo> onlyLiveUsers = mUserManager.getUsers(true); |
| 793 | users.removeAll(onlyLiveUsers); |
| 794 | return users; |
| 795 | } |
| 796 | |
| 797 | private static final class PackageManagerHelper implements |
| 798 | OverlayManagerServiceImpl.PackageManagerHelper { |
| 799 | |
| 800 | private final IPackageManager mPackageManager; |
| 801 | private final PackageManagerInternal mPackageManagerInternal; |
| 802 | |
| 803 | // Use a cache for performance and for consistency within OMS: because |
| 804 | // additional PACKAGE_* intents may be delivered while we process an |
| 805 | // intent, querying the PackageManagerService for the actual current |
| 806 | // state may lead to contradictions within OMS. Better then to lag |
| 807 | // behind until all pending intents have been processed. |
| 808 | private final SparseArray<HashMap<String, PackageInfo>> mCache = new SparseArray<>(); |
| 809 | |
| 810 | PackageManagerHelper() { |
| 811 | mPackageManager = getPackageManager(); |
| 812 | mPackageManagerInternal = LocalServices.getService(PackageManagerInternal.class); |
| 813 | } |
| 814 | |
| 815 | public PackageInfo getPackageInfo(@NonNull final String packageName, final int userId, |
| 816 | final boolean useCache) { |
| 817 | if (useCache) { |
| 818 | final PackageInfo cachedPi = getCachedPackageInfo(packageName, userId); |
| 819 | if (cachedPi != null) { |
| 820 | return cachedPi; |
| 821 | } |
| 822 | } |
| 823 | try { |
| 824 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, 0, userId); |
| 825 | if (useCache && pi != null) { |
| 826 | cachePackageInfo(packageName, userId, pi); |
| 827 | } |
| 828 | return pi; |
| 829 | } catch (RemoteException e) { |
| 830 | // Intentionally left empty. |
| 831 | } |
| 832 | return null; |
| 833 | } |
| 834 | |
| 835 | @Override |
| 836 | public PackageInfo getPackageInfo(@NonNull final String packageName, final int userId) { |
| 837 | return getPackageInfo(packageName, userId, true); |
| 838 | } |
| 839 | |
| 840 | @Override |
| 841 | public boolean signaturesMatching(@NonNull final String packageName1, |
| 842 | @NonNull final String packageName2, final int userId) { |
| 843 | // The package manager does not support different versions of packages |
| 844 | // to be installed for different users: ignore userId for now. |
| 845 | try { |
| 846 | return mPackageManager.checkSignatures(packageName1, packageName2) == SIGNATURE_MATCH; |
| 847 | } catch (RemoteException e) { |
| 848 | // Intentionally left blank |
| 849 | } |
| 850 | return false; |
| 851 | } |
| 852 | |
| 853 | @Override |
| 854 | public List<PackageInfo> getOverlayPackages(final int userId) { |
| 855 | return mPackageManagerInternal.getOverlayPackages(userId); |
| 856 | } |
| 857 | |
| 858 | public PackageInfo getCachedPackageInfo(@NonNull final String packageName, |
| 859 | final int userId) { |
| 860 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 861 | return map == null ? null : map.get(packageName); |
| 862 | } |
| 863 | |
| 864 | public void cachePackageInfo(@NonNull final String packageName, final int userId, |
| 865 | @NonNull final PackageInfo pi) { |
| 866 | HashMap<String, PackageInfo> map = mCache.get(userId); |
| 867 | if (map == null) { |
| 868 | map = new HashMap<>(); |
| 869 | mCache.put(userId, map); |
| 870 | } |
| 871 | map.put(packageName, pi); |
| 872 | } |
| 873 | |
| 874 | public void forgetPackageInfo(@NonNull final String packageName, final int userId) { |
| 875 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 876 | if (map == null) { |
| 877 | return; |
| 878 | } |
| 879 | map.remove(packageName); |
| 880 | if (map.isEmpty()) { |
| 881 | mCache.delete(userId); |
| 882 | } |
| 883 | } |
| 884 | |
| 885 | public void forgetAllPackageInfos(final int userId) { |
| 886 | mCache.delete(userId); |
| 887 | } |
| 888 | |
| 889 | private static final String TAB1 = " "; |
| 890 | private static final String TAB2 = TAB1 + TAB1; |
| 891 | |
| 892 | public void dump(@NonNull final PrintWriter pw, final boolean verbose) { |
| 893 | pw.println("PackageInfo cache"); |
| 894 | |
| 895 | if (!verbose) { |
| 896 | int count = 0; |
| 897 | final int N = mCache.size(); |
| 898 | for (int i = 0; i < N; i++) { |
| 899 | final int userId = mCache.keyAt(i); |
| 900 | count += mCache.get(userId).size(); |
| 901 | } |
| 902 | pw.println(TAB1 + count + " package(s)"); |
| 903 | return; |
| 904 | } |
| 905 | |
| 906 | if (mCache.size() == 0) { |
| 907 | pw.println(TAB1 + "<empty>"); |
| 908 | return; |
| 909 | } |
| 910 | |
| 911 | final int N = mCache.size(); |
| 912 | for (int i = 0; i < N; i++) { |
| 913 | final int userId = mCache.keyAt(i); |
| 914 | pw.println(TAB1 + "User " + userId); |
| 915 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 916 | for (Map.Entry<String, PackageInfo> entry : map.entrySet()) { |
| 917 | pw.println(TAB2 + entry.getKey() + ": " + entry.getValue()); |
| 918 | } |
| 919 | } |
| 920 | } |
| 921 | } |
| 922 | } |