Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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.rollback; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.Intent; |
| 21 | import android.content.pm.PackageInstaller; |
Richard Uhler | 0e96192 | 2019-01-25 13:07:08 +0000 | [diff] [blame] | 22 | import android.content.rollback.PackageRollbackInfo; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 23 | import android.content.rollback.RollbackInfo; |
| 24 | import android.content.rollback.RollbackManager; |
| 25 | import android.os.Handler; |
| 26 | import android.os.HandlerThread; |
| 27 | |
| 28 | import com.android.server.PackageWatchdog; |
| 29 | import com.android.server.PackageWatchdog.PackageHealthObserver; |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 30 | import com.android.server.PackageWatchdog.PackageHealthObserverImpact; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 31 | |
Richard Uhler | bf5b5c4 | 2019-01-28 15:26:37 +0000 | [diff] [blame] | 32 | import java.util.Collections; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 33 | import java.util.List; |
| 34 | |
| 35 | /** |
| 36 | * {@code PackageHealthObserver} for {@code RollbackManagerService}. |
| 37 | * |
| 38 | * @hide |
| 39 | */ |
| 40 | public final class RollbackPackageHealthObserver implements PackageHealthObserver { |
| 41 | private static final String TAG = "RollbackPackageHealthObserver"; |
| 42 | private static final String NAME = "rollback-observer"; |
| 43 | private Context mContext; |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 44 | private RollbackManager mRollbackManager; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 45 | private Handler mHandler; |
| 46 | |
| 47 | RollbackPackageHealthObserver(Context context) { |
| 48 | mContext = context; |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 49 | mRollbackManager = mContext.getSystemService(RollbackManager.class); |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 50 | HandlerThread handlerThread = new HandlerThread("RollbackPackageHealthObserver"); |
| 51 | handlerThread.start(); |
| 52 | mHandler = handlerThread.getThreadHandler(); |
| 53 | PackageWatchdog.getInstance(mContext).registerHealthObserver(this); |
| 54 | } |
| 55 | |
| 56 | @Override |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 57 | public int onHealthCheckFailed(String packageName) { |
| 58 | RollbackInfo rollback = getAvailableRollback(packageName); |
| 59 | if (rollback == null) { |
| 60 | // Don't handle the notification, no rollbacks available for the package |
| 61 | return PackageHealthObserverImpact.USER_IMPACT_NONE; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 62 | } |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 63 | // Rollback is available, we may get a callback into #execute |
| 64 | return PackageHealthObserverImpact.USER_IMPACT_MEDIUM; |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public boolean execute(String packageName) { |
| 69 | RollbackInfo rollback = getAvailableRollback(packageName); |
| 70 | if (rollback == null) { |
| 71 | // Expected a rollback to be available, what happened? |
| 72 | return false; |
| 73 | } |
| 74 | |
| 75 | // TODO(zezeozue): Only rollback if rollback version == failed package version |
| 76 | LocalIntentReceiver rollbackReceiver = new LocalIntentReceiver((Intent result) -> { |
| 77 | int status = result.getIntExtra(PackageInstaller.EXTRA_STATUS, |
| 78 | PackageInstaller.STATUS_FAILURE); |
| 79 | if (status == PackageInstaller.STATUS_SUCCESS) { |
| 80 | // TODO(zezeozue); Log success metrics |
| 81 | // Rolledback successfully, no action required by other observers |
| 82 | } else { |
| 83 | // TODO(zezeozue); Log failure metrics |
| 84 | // Rollback failed other observers should have a shot |
| 85 | } |
| 86 | }); |
| 87 | |
| 88 | // TODO(zezeozue): Log initiated metrics |
Richard Uhler | bf5b5c4 | 2019-01-28 15:26:37 +0000 | [diff] [blame] | 89 | // TODO: Pass the package as a cause package instead of using |
| 90 | // Collections.emptyList once the version of the failing package is |
| 91 | // easily available. |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 92 | mHandler.post(() -> |
Richard Uhler | e87368e | 2019-01-24 16:34:14 +0000 | [diff] [blame] | 93 | mRollbackManager.commitRollback(rollback.getRollbackId(), |
Richard Uhler | bf5b5c4 | 2019-01-28 15:26:37 +0000 | [diff] [blame] | 94 | Collections.emptyList(), |
Richard Uhler | e87368e | 2019-01-24 16:34:14 +0000 | [diff] [blame] | 95 | rollbackReceiver.getIntentSender())); |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 96 | // Assume rollback executed successfully |
| 97 | return true; |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public String getName() { |
| 102 | return NAME; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Start observing health of {@code packages} for {@code durationMs}. |
| 107 | * This may cause {@code packages} to be rolled back if they crash too freqeuntly. |
| 108 | */ |
| 109 | public void startObservingHealth(List<String> packages, long durationMs) { |
| 110 | PackageWatchdog.getInstance(mContext).startObservingHealth(this, packages, durationMs); |
| 111 | } |
| 112 | |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 113 | private RollbackInfo getAvailableRollback(String packageName) { |
| 114 | for (RollbackInfo rollback : mRollbackManager.getAvailableRollbacks()) { |
| 115 | for (PackageRollbackInfo packageRollback : rollback.getPackages()) { |
| 116 | if (packageName.equals(packageRollback.getPackageName())) { |
| 117 | // TODO(zezeozue): Only rollback if rollback version == failed package version |
| 118 | return rollback; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 119 | } |
Zimuzo | e5009cd | 2019-01-23 18:11:58 +0000 | [diff] [blame] | 120 | } |
| 121 | } |
| 122 | return null; |
Zimuzo | c4073cc | 2019-01-18 18:39:18 +0000 | [diff] [blame] | 123 | } |
| 124 | } |