| /* |
| * 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.s |
| */ |
| |
| package com.android.server.pm; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.apex.ApexInfo; |
| import android.apex.ApexInfoList; |
| import android.apex.ApexSessionInfo; |
| import android.apex.IApexService; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageParser; |
| import android.content.pm.PackageParser.PackageParserException; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.ServiceManager.ServiceNotFoundException; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.IndentingPrintWriter; |
| |
| import java.io.File; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| |
| /** |
| * ApexManager class handles communications with the apex service to perform operation and queries, |
| * as well as providing caching to avoid unnecessary calls to the service. |
| */ |
| class ApexManager { |
| static final String TAG = "ApexManager"; |
| private final IApexService mApexService; |
| private final Context mContext; |
| private final Object mLock = new Object(); |
| @GuardedBy("mLock") |
| private Map<String, PackageInfo> mActivePackagesCache; |
| |
| ApexManager(Context context) { |
| try { |
| mApexService = IApexService.Stub.asInterface( |
| ServiceManager.getServiceOrThrow("apexservice")); |
| } catch (ServiceNotFoundException e) { |
| throw new IllegalStateException("Required service apexservice not available"); |
| } |
| mContext = context; |
| } |
| |
| void systemReady() { |
| mContext.registerReceiver(new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| onBootCompleted(); |
| mContext.unregisterReceiver(this); |
| } |
| }, new IntentFilter(Intent.ACTION_BOOT_COMPLETED)); |
| } |
| |
| private void populateActivePackagesCacheIfNeeded() { |
| synchronized (mLock) { |
| if (mActivePackagesCache != null) { |
| return; |
| } |
| try { |
| List<PackageInfo> list = new ArrayList<>(); |
| final ApexInfo[] activePkgs = mApexService.getActivePackages(); |
| for (ApexInfo ai : activePkgs) { |
| // If the device is using flattened APEX, don't report any APEX |
| // packages since they won't be managed or updated by PackageManager. |
| if ((new File(ai.packagePath)).isDirectory()) { |
| break; |
| } |
| try { |
| list.add(PackageParser.generatePackageInfoFromApex( |
| new File(ai.packagePath), PackageManager.GET_META_DATA |
| | PackageManager.GET_SIGNING_CERTIFICATES)); |
| } catch (PackageParserException pe) { |
| throw new IllegalStateException("Unable to parse: " + ai, pe); |
| } |
| } |
| mActivePackagesCache = list.stream().collect( |
| Collectors.toMap(p -> p.packageName, Function.identity())); |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to retrieve packages from apexservice: " + re.toString()); |
| throw new RuntimeException(re); |
| } |
| } |
| } |
| |
| /** |
| * Retrieves information about an active APEX package. |
| * |
| * @param packageName the package name to look for. Note that this is the package name reported |
| * in the APK container manifest (i.e. AndroidManifest.xml), which might |
| * differ from the one reported in the APEX manifest (i.e. |
| * apex_manifest.json). |
| * @return a PackageInfo object with the information about the package, or null if the package |
| * is not found. |
| */ |
| @Nullable PackageInfo getActivePackage(String packageName) { |
| populateActivePackagesCacheIfNeeded(); |
| return mActivePackagesCache.get(packageName); |
| } |
| |
| /** |
| * Retrieves information about all active APEX packages. |
| * |
| * @return a Collection of PackageInfo object, each one containing information about a different |
| * active package. |
| */ |
| Collection<PackageInfo> getActivePackages() { |
| populateActivePackagesCacheIfNeeded(); |
| return mActivePackagesCache.values(); |
| } |
| |
| /** |
| * Checks if {@code packageName} is an apex package. |
| * |
| * @param packageName package to check. |
| * @return {@code true} if {@code packageName} is an apex package. |
| */ |
| boolean isApexPackage(String packageName) { |
| populateActivePackagesCacheIfNeeded(); |
| return mActivePackagesCache.containsKey(packageName); |
| } |
| |
| /** |
| * Retrieves information about an apexd staged session i.e. the internal state used by apexd to |
| * track the different states of a session. |
| * |
| * @param sessionId the identifier of the session. |
| * @return an ApexSessionInfo object, or null if the session is not known. |
| */ |
| @Nullable ApexSessionInfo getStagedSessionInfo(int sessionId) { |
| try { |
| ApexSessionInfo apexSessionInfo = mApexService.getStagedSessionInfo(sessionId); |
| if (apexSessionInfo.isUnknown) { |
| return null; |
| } |
| return apexSessionInfo; |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to contact apexservice", re); |
| throw new RuntimeException(re); |
| } |
| } |
| |
| /** |
| * Submit a staged session to apex service. This causes the apex service to perform some initial |
| * verification and accept or reject the session. Submitting a session successfully is not |
| * enough for it to be activated at the next boot, the caller needs to call |
| * {@link #markStagedSessionReady(int)}. |
| * |
| * @param sessionId the identifier of the {@link PackageInstallerSession} being submitted. |
| * @param childSessionIds if {@code sessionId} is a multi-package session, this should contain |
| * an array of identifiers of all the child sessions. Otherwise it should |
| * be an empty array. |
| * @param apexInfoList this is an output parameter, which needs to be initialized by tha caller |
| * and will be filled with a list of {@link ApexInfo} objects, each of which |
| * contains metadata about one of the packages being submitted as part of |
| * the session. |
| * @return whether the submission of the session was successful. |
| */ |
| boolean submitStagedSession( |
| int sessionId, @NonNull int[] childSessionIds, @NonNull ApexInfoList apexInfoList) { |
| try { |
| return mApexService.submitStagedSession(sessionId, childSessionIds, apexInfoList); |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to contact apexservice", re); |
| throw new RuntimeException(re); |
| } |
| } |
| |
| /** |
| * Mark a staged session previously submitted using {@code submitStagedSession} as ready to be |
| * applied at next reboot. |
| * |
| * @param sessionId the identifier of the {@link PackageInstallerSession} being marked as ready. |
| * @return true upon success, false if the session is unknown. |
| */ |
| boolean markStagedSessionReady(int sessionId) { |
| try { |
| return mApexService.markStagedSessionReady(sessionId); |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to contact apexservice", re); |
| throw new RuntimeException(re); |
| } |
| } |
| |
| /** |
| * Marks a staged session as successful. |
| * |
| * <p>Only activated session can be marked as successful. |
| * |
| * @param sessionId the identifier of the {@link PackageInstallerSession} being marked as |
| * successful. |
| */ |
| void markStagedSessionSuccessful(int sessionId) { |
| try { |
| mApexService.markStagedSessionSuccessful(sessionId); |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to contact apexservice", re); |
| throw new RuntimeException(re); |
| } catch (Exception e) { |
| // It is fine to just log an exception in this case. APEXd will be able to recover in |
| // case markStagedSessionSuccessful fails. |
| Slog.e(TAG, "Failed to mark session " + sessionId + " as successful", e); |
| } |
| } |
| |
| /** |
| * Whether the current device supports the management of APEX packages. |
| * |
| * @return true if APEX packages can be managed on this device, false otherwise. |
| */ |
| boolean isApexSupported() { |
| populateActivePackagesCacheIfNeeded(); |
| // There is no system-wide property available to check if APEX are flattened and hence can't |
| // be updated. In absence of such property, we assume that if we didn't index APEX packages |
| // since they were flattened, no APEX management should be possible. |
| return !mActivePackagesCache.isEmpty(); |
| } |
| |
| /** |
| * Abandons the (only) active session previously submitted. |
| * |
| * @return {@code true} upon success, {@code false} if any remote exception occurs |
| */ |
| boolean abortActiveSession() { |
| try { |
| mApexService.abortActiveSession(); |
| return true; |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to contact apexservice", re); |
| return false; |
| } |
| } |
| |
| /** |
| * Uninstalls given {@code apexPackage}. |
| * |
| * <p>NOTE. Device must be rebooted in order for uninstall to take effect. |
| * |
| * @param apexPackagePath package to uninstall. |
| * @return {@code true} upon successful uninstall, {@code false} otherwise. |
| */ |
| boolean uninstallApex(String apexPackagePath) { |
| try { |
| mApexService.unstagePackages(Collections.singletonList(apexPackagePath)); |
| return true; |
| } catch (Exception e) { |
| return false; |
| } |
| } |
| |
| /** |
| * Dumps various state information to the provided {@link PrintWriter} object. |
| * |
| * @param pw the {@link PrintWriter} object to send information to. |
| * @param packageName a {@link String} containing a package name, or {@code null}. If set, only |
| * information about that specific package will be dumped. |
| */ |
| void dump(PrintWriter pw, @Nullable String packageName) { |
| final IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " ", 120); |
| ipw.println(); |
| ipw.println("Active APEX packages:"); |
| ipw.increaseIndent(); |
| try { |
| populateActivePackagesCacheIfNeeded(); |
| for (PackageInfo pi : mActivePackagesCache.values()) { |
| if (packageName != null && !packageName.equals(pi.packageName)) { |
| continue; |
| } |
| ipw.println(pi.packageName); |
| ipw.increaseIndent(); |
| ipw.println("Version: " + pi.versionCode); |
| ipw.println("Path: " + pi.applicationInfo.sourceDir); |
| ipw.decreaseIndent(); |
| } |
| ipw.decreaseIndent(); |
| ipw.println(); |
| ipw.println("APEX session state:"); |
| ipw.increaseIndent(); |
| final ApexSessionInfo[] sessions = mApexService.getSessions(); |
| for (ApexSessionInfo si : sessions) { |
| ipw.println("Session ID: " + si.sessionId); |
| ipw.increaseIndent(); |
| if (si.isUnknown) { |
| ipw.println("State: UNKNOWN"); |
| } else if (si.isVerified) { |
| ipw.println("State: VERIFIED"); |
| } else if (si.isStaged) { |
| ipw.println("State: STAGED"); |
| } else if (si.isActivated) { |
| ipw.println("State: ACTIVATED"); |
| } else if (si.isActivationFailed) { |
| ipw.println("State: ACTIVATION FAILED"); |
| } else if (si.isSuccess) { |
| ipw.println("State: SUCCESS"); |
| } else if (si.isRollbackInProgress) { |
| ipw.println("State: ROLLBACK IN PROGRESS"); |
| } else if (si.isRolledBack) { |
| ipw.println("State: ROLLED BACK"); |
| } |
| ipw.decreaseIndent(); |
| } |
| ipw.decreaseIndent(); |
| } catch (RemoteException e) { |
| ipw.println("Couldn't communicate with apexd."); |
| } |
| } |
| |
| public void onBootCompleted() { |
| populateActivePackagesCacheIfNeeded(); |
| } |
| } |