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Partially Revert "DynamicDenylistManager shall not exist"

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This is required by SettingsGoogle fuel gauge.

This reverts commit da270f9fa1383b6717d6a872dc90eac8a6783c27.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
This commit is contained in:
Pranav Vashi
2024-11-30 11:27:28 +05:30
committed by Joey
parent a43e38e39b
commit d61824a1c9
1 changed files with 260 additions and 0 deletions
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260
src/com/android/settings/fuelgauge/datasaver/DynamicDenylistManager.java Normal file
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/*
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.fuelgauge.datasaver;
import static android.net.NetworkPolicyManager.POLICY_NONE;
import static android.net.NetworkPolicyManager.POLICY_REJECT_METERED_BACKGROUND;
import static com.android.settings.Utils.SETTINGS_PACKAGE_NAME;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.net.NetworkPolicyManager;
import android.util.ArraySet;
import android.util.Log;
import androidx.annotation.VisibleForTesting;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
/** A class to dynamically manage per apps {@link NetworkPolicyManager} POLICY_ flags. */
public class DynamicDenylistManager {
private static final String TAG = "DynamicDenylistManager";
private static final String PREF_KEY_MANUAL_DENY = "manual_denylist_preference";
private static final String PREF_KEY_DYNAMIC_DENY = "dynamic_denylist_preference";
@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
public static DynamicDenylistManager sInstance = null;
private final Context mContext;
private final NetworkPolicyManager mNetworkPolicyManager;
private final Object mLock = new Object();
@VisibleForTesting
static final String PREF_KEY_MANUAL_DENYLIST_SYNCED = "manual_denylist_synced";
/** @return a DynamicDenylistManager object */
public static DynamicDenylistManager getInstance(Context context) {
synchronized (DynamicDenylistManager.class) {
if (sInstance == null) {
sInstance = new DynamicDenylistManager(
context, NetworkPolicyManager.from(context));
}
return sInstance;
}
}
@VisibleForTesting
DynamicDenylistManager(Context context, NetworkPolicyManager networkPolicyManager) {
mContext = context.getApplicationContext();
mNetworkPolicyManager = networkPolicyManager;
syncPolicyIfNeeded();
}
/** Sync the policy from {@link NetworkPolicyManager} if needed. */
private void syncPolicyIfNeeded() {
if (getManualDenylistPref().contains(PREF_KEY_MANUAL_DENYLIST_SYNCED)) {
Log.i(TAG, "syncPolicyIfNeeded() ignore synced manual denylist");
return;
}
final SharedPreferences.Editor editor = getManualDenylistPref().edit();
final int[] existedUids = mNetworkPolicyManager
.getUidsWithPolicy(POLICY_REJECT_METERED_BACKGROUND);
if (existedUids != null && existedUids.length != 0) {
for (int uid : existedUids) {
editor.putInt(String.valueOf(uid), POLICY_REJECT_METERED_BACKGROUND);
}
}
editor.putInt(PREF_KEY_MANUAL_DENYLIST_SYNCED, POLICY_NONE).apply();
}
/** Set policy flags for specific UID. */
public void setUidPolicyLocked(int uid, int policy) {
Log.i(TAG, "setUidPolicyLocked: uid=" + uid + " policy=" + policy);
synchronized (mLock) {
mNetworkPolicyManager.setUidPolicy(uid, policy);
}
updateDenylistPref(uid, policy);
}
/** Suggest a list of package to set as POLICY_REJECT. */
public void setDenylist(Set<Integer> denylistTargetUids) {
if (denylistTargetUids == null) {
return;
}
final Set<Integer> manualDenylistUids = getDenylistAllUids(getManualDenylistPref());
denylistTargetUids.removeAll(manualDenylistUids);
final Set<Integer> lastDynamicDenylistUids = getDenylistAllUids(getDynamicDenylistPref());
if (lastDynamicDenylistUids.equals(denylistTargetUids)) {
Log.i(TAG, "setDenylist() ignore the same denylist with size: "
+ lastDynamicDenylistUids.size());
return;
}
final ArraySet<Integer> failedUids = new ArraySet<>();
synchronized (mLock) {
// Set new added UIDs into REJECT policy.
for (Integer uidInteger : denylistTargetUids) {
if (uidInteger == null) {
continue;
}
final int uid = uidInteger.intValue();
if (!lastDynamicDenylistUids.contains(uid)) {
try {
mNetworkPolicyManager.setUidPolicy(uid, POLICY_REJECT_METERED_BACKGROUND);
} catch (Exception e) {
Log.e(TAG, "failed to setUidPolicy(REJECT) for " + uid, e);
failedUids.add(uid);
}
}
}
// Unset removed UIDs back to NONE policy.
for (int uid : lastDynamicDenylistUids) {
if (!denylistTargetUids.contains(uid)) {
try {
mNetworkPolicyManager.setUidPolicy(uid, POLICY_NONE);
} catch (Exception e) {
Log.e(TAG, "failed to setUidPolicy(NONE) for " + uid, e);
}
}
}
}
// Store target denied uids into DynamicDenylistPref.
final SharedPreferences.Editor editor = getDynamicDenylistPref().edit();
editor.clear();
denylistTargetUids.forEach(uid -> {
if (!failedUids.contains(uid)) {
editor.putInt(String.valueOf(uid), POLICY_REJECT_METERED_BACKGROUND);
}
});
editor.apply();
}
/** Return true if the target uid is in {@link #getManualDenylistPref()}. */
public boolean isInManualDenylist(int uid) {
return getManualDenylistPref().contains(String.valueOf(uid));
}
/** Reset the UIDs in the denylist if needed. */
public void resetDenylistIfNeeded(String packageName, boolean force) {
if (!force && !SETTINGS_PACKAGE_NAME.equals(packageName)) {
Log.w(TAG, "resetDenylistIfNeeded: invalid conditions");
return;
}
synchronized (mLock) {
final int[] uids = mNetworkPolicyManager
.getUidsWithPolicy(POLICY_REJECT_METERED_BACKGROUND);
if (uids != null && uids.length != 0) {
Log.i(TAG, "resetDenylistIfNeeded: " + Arrays.toString(uids));
for (int uid : uids) {
if (!getDenylistAllUids(getManualDenylistPref()).contains(uid)) {
mNetworkPolicyManager.setUidPolicy(uid, POLICY_NONE);
}
}
} else {
Log.w(TAG, "resetDenylistIfNeeded: there is no valid UIDs");
}
}
clearSharedPreferences();
}
/** Reset the POLICY_REJECT_METERED uids when device is boot completed. */
public void onBootComplete() {
resetDenylistIfNeeded(/* packageName= */ null, /* force= */ true);
syncPolicyIfNeeded();
}
/** Dump the data stored in the {@link SharedPreferences}. */
public void dump(PrintWriter writer) {
writer.println("Dump of DynamicDenylistManager:");
final List<String> manualDenyList =
getPackageNames(mContext, getDenylistAllUids(getManualDenylistPref()));
writer.println("\tManualDenylist:");
if (manualDenyList != null) {
manualDenyList.forEach(packageName -> writer.println("\t\t" + packageName));
writer.flush();
}
final List<String> dynamicDenyList =
getPackageNames(mContext, getDenylistAllUids(getDynamicDenylistPref()));
writer.println("\tDynamicDenylist:");
if (dynamicDenyList != null) {
dynamicDenyList.forEach(packageName -> writer.println("\t\t" + packageName));
writer.flush();
}
}
private Set<Integer> getDenylistAllUids(SharedPreferences sharedPreferences) {
final ArraySet<Integer> uids = new ArraySet<>();
for (String key : sharedPreferences.getAll().keySet()) {
if (PREF_KEY_MANUAL_DENYLIST_SYNCED.equals(key)) {
continue;
}
try {
uids.add(Integer.parseInt(key));
} catch (NumberFormatException e) {
Log.e(TAG, "getDenylistAllUids() unexpected format for " + key);
}
}
return uids;
}
void updateDenylistPref(int uid, int policy) {
final String uidString = String.valueOf(uid);
if (policy != POLICY_REJECT_METERED_BACKGROUND) {
getManualDenylistPref().edit().remove(uidString).apply();
} else {
getManualDenylistPref().edit().putInt(uidString, policy).apply();
}
getDynamicDenylistPref().edit().remove(uidString).apply();
}
void clearSharedPreferences() {
Log.i(TAG, "clearSharedPreferences()");
getManualDenylistPref().edit().clear().apply();
getDynamicDenylistPref().edit().clear().apply();
}
@VisibleForTesting
SharedPreferences getManualDenylistPref() {
return mContext.getSharedPreferences(PREF_KEY_MANUAL_DENY, Context.MODE_PRIVATE);
}
@VisibleForTesting
SharedPreferences getDynamicDenylistPref() {
return mContext.getSharedPreferences(PREF_KEY_DYNAMIC_DENY, Context.MODE_PRIVATE);
}
private static List<String> getPackageNames(Context context, Set<Integer> uids) {
if (uids == null || uids.isEmpty()) {
return null;
}
final PackageManager pm = context.getPackageManager();
final List<String> packageNames = new ArrayList<>(uids.size());
uids.forEach(uid -> packageNames.add(pm.getNameForUid(uid)));
return packageNames;
}
}