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Merge changes I48a8de47,I95ea3050,I5a98c4cd into rvc-dev

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* changes:
  [BOT.11] BpfCoordinator could be disabled by device config
  [BOT.8] Dump BPF offload information in dumpsys
  [BOT.10] Add unit test for data limit and rule change in BpfCoordinator
This commit is contained in:
TreeHugger Robot
2020-06-18 05:16:07 +00:00
committed by Android (Google) Code Review
parent 53795ae7ae 3f856b48f9
commit ec5a703838
6 changed files with 469 additions and 27 deletions
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138
packages/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
View File

@@ -36,6 +36,7 @@ import android.net.ip.IpServer;
import android.net.netstats.provider.NetworkStatsProvider;
import android.net.util.SharedLog;
import android.net.util.TetheringUtils.ForwardedStats;
import android.os.ConditionVariable;
import android.os.Handler;
import android.os.RemoteException;
import android.os.ServiceSpecificException;
@@ -47,11 +48,13 @@ import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.IndentingPrintWriter;
import java.net.Inet6Address;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
/**
@@ -65,6 +68,7 @@ import java.util.Objects;
*/
public class BpfCoordinator {
private static final String TAG = BpfCoordinator.class.getSimpleName();
private static final int DUMP_TIMEOUT_MS = 10_000;
@VisibleForTesting
static final int DEFAULT_PERFORM_POLL_INTERVAL_MS = 5000; // TODO: Make it customizable.
@@ -85,6 +89,13 @@ public class BpfCoordinator {
@Nullable
private final BpfTetherStatsProvider mStatsProvider;
// True if BPF offload is supported, false otherwise. The BPF offload could be disabled by
// a runtime resource overlay package or device configuration. This flag is only initialized
// in the constructor because it is hard to unwind all existing change once device
// configuration is changed. Especially the forwarding rules. Keep the same setting
// to make it simpler. See also TetheringConfiguration.
private final boolean mUsingBpf;
// Tracks whether BPF tethering is started or not. This is set by tethering before it
// starts the first IpServer and is cleared by tethering shortly before the last IpServer
// is stopped. Note that rule updates (especially deletions, but sometimes additions as
@@ -142,22 +153,42 @@ public class BpfCoordinator {
};
@VisibleForTesting
public static class Dependencies {
int getPerformPollInterval() {
public abstract static class Dependencies {
/**
* Get polling Interval in milliseconds.
*/
public int getPerformPollInterval() {
// TODO: Consider make this configurable.
return DEFAULT_PERFORM_POLL_INTERVAL_MS;
}
/** Get handler. */
@NonNull public abstract Handler getHandler();
/** Get netd. */
@NonNull public abstract INetd getNetd();
/** Get network stats manager. */
@NonNull public abstract NetworkStatsManager getNetworkStatsManager();
/** Get shared log. */
@NonNull public abstract SharedLog getSharedLog();
/** Get tethering configuration. */
@Nullable public abstract TetheringConfiguration getTetherConfig();
}
@VisibleForTesting
public BpfCoordinator(@NonNull Handler handler, @NonNull INetd netd,
@NonNull NetworkStatsManager nsm, @NonNull SharedLog log, @NonNull Dependencies deps) {
mHandler = handler;
mNetd = netd;
mLog = log.forSubComponent(TAG);
public BpfCoordinator(@NonNull Dependencies deps) {
mDeps = deps;
mHandler = mDeps.getHandler();
mNetd = mDeps.getNetd();
mLog = mDeps.getSharedLog().forSubComponent(TAG);
mUsingBpf = isOffloadEnabled();
BpfTetherStatsProvider provider = new BpfTetherStatsProvider();
try {
nsm.registerNetworkStatsProvider(getClass().getSimpleName(), provider);
mDeps.getNetworkStatsManager().registerNetworkStatsProvider(
getClass().getSimpleName(), provider);
} catch (RuntimeException e) {
// TODO: Perhaps not allow to use BPF offload because the reregistration failure
// implied that no data limit could be applies on a metered upstream if any.
@@ -165,7 +196,6 @@ public class BpfCoordinator {
provider = null;
}
mStatsProvider = provider;
mDeps = deps;
}
/**
@@ -177,6 +207,11 @@ public class BpfCoordinator {
public void startPolling() {
if (mPollingStarted) return;
if (!mUsingBpf) {
mLog.i("Offload disabled");
return;
}
mPollingStarted = true;
maybeSchedulePollingStats();
@@ -211,6 +246,8 @@ public class BpfCoordinator {
*/
public void tetherOffloadRuleAdd(
@NonNull final IpServer ipServer, @NonNull final Ipv6ForwardingRule rule) {
if (!mUsingBpf) return;
try {
// TODO: Perhaps avoid to add a duplicate rule.
mNetd.tetherOffloadRuleAdd(rule.toTetherOffloadRuleParcel());
@@ -250,6 +287,8 @@ public class BpfCoordinator {
*/
public void tetherOffloadRuleRemove(
@NonNull final IpServer ipServer, @NonNull final Ipv6ForwardingRule rule) {
if (!mUsingBpf) return;
try {
// TODO: Perhaps avoid to remove a non-existent rule.
mNetd.tetherOffloadRuleRemove(rule.toTetherOffloadRuleParcel());
@@ -293,6 +332,8 @@ public class BpfCoordinator {
* Note that this can be only called on handler thread.
*/
public void tetherOffloadRuleClear(@NonNull final IpServer ipServer) {
if (!mUsingBpf) return;
final LinkedHashMap<Inet6Address, Ipv6ForwardingRule> rules = mIpv6ForwardingRules.get(
ipServer);
if (rules == null) return;
@@ -308,6 +349,8 @@ public class BpfCoordinator {
* Note that this can be only called on handler thread.
*/
public void tetherOffloadRuleUpdate(@NonNull final IpServer ipServer, int newUpstreamIfindex) {
if (!mUsingBpf) return;
final LinkedHashMap<Inet6Address, Ipv6ForwardingRule> rules = mIpv6ForwardingRules.get(
ipServer);
if (rules == null) return;
@@ -330,6 +373,8 @@ public class BpfCoordinator {
* Note that this can be only called on handler thread.
*/
public void addUpstreamNameToLookupTable(int upstreamIfindex, @NonNull String upstreamIface) {
if (!mUsingBpf) return;
if (upstreamIfindex == 0 || TextUtils.isEmpty(upstreamIface)) return;
// The same interface index to name mapping may be added by different IpServer objects or
@@ -344,6 +389,76 @@ public class BpfCoordinator {
}
}
/**
* Dump information.
* Block the function until all the data are dumped on the handler thread or timed-out. The
* reason is that dumpsys invokes this function on the thread of caller and the data may only
* be allowed to be accessed on the handler thread.
*/
public void dump(@NonNull IndentingPrintWriter pw) {
final ConditionVariable dumpDone = new ConditionVariable();
mHandler.post(() -> {
pw.println("mUsingBpf: " + mUsingBpf);
pw.println("Polling " + (mPollingStarted ? "started" : "not started"));
pw.println("Stats provider " + (mStatsProvider != null
? "registered" : "not registered"));
pw.println("Upstream quota: " + mInterfaceQuotas.toString());
pw.println("Forwarding stats:");
pw.increaseIndent();
if (mStats.size() == 0) {
pw.println("<empty>");
} else {
dumpStats(pw);
}
pw.decreaseIndent();
pw.println("Forwarding rules:");
pw.increaseIndent();
if (mIpv6ForwardingRules.size() == 0) {
pw.println("<empty>");
} else {
dumpIpv6ForwardingRules(pw);
}
pw.decreaseIndent();
dumpDone.open();
});
if (!dumpDone.block(DUMP_TIMEOUT_MS)) {
pw.println("... dump timed-out after " + DUMP_TIMEOUT_MS + "ms");
}
}
private void dumpStats(@NonNull IndentingPrintWriter pw) {
for (int i = 0; i < mStats.size(); i++) {
final int upstreamIfindex = mStats.keyAt(i);
final ForwardedStats stats = mStats.get(upstreamIfindex);
pw.println(String.format("%d(%s) - %s", upstreamIfindex, mInterfaceNames.get(
upstreamIfindex), stats.toString()));
}
}
private void dumpIpv6ForwardingRules(@NonNull IndentingPrintWriter pw) {
for (Map.Entry<IpServer, LinkedHashMap<Inet6Address, Ipv6ForwardingRule>> entry :
mIpv6ForwardingRules.entrySet()) {
IpServer ipServer = entry.getKey();
// The rule downstream interface index is paired with the interface name from
// IpServer#interfaceName. See #startIPv6, #updateIpv6ForwardingRules in IpServer.
final String downstreamIface = ipServer.interfaceName();
pw.println("[" + downstreamIface + "]: iif(iface) oif(iface) v6addr srcmac dstmac");
pw.increaseIndent();
LinkedHashMap<Inet6Address, Ipv6ForwardingRule> rules = entry.getValue();
for (Ipv6ForwardingRule rule : rules.values()) {
final int upstreamIfindex = rule.upstreamIfindex;
pw.println(String.format("%d(%s) %d(%s) %s %s %s", upstreamIfindex,
mInterfaceNames.get(upstreamIfindex), rule.downstreamIfindex,
downstreamIface, rule.address, rule.srcMac, rule.dstMac));
}
pw.decreaseIndent();
}
}
/** IPv6 forwarding rule class. */
public static class Ipv6ForwardingRule {
public final int upstreamIfindex;
@@ -474,6 +589,11 @@ public class BpfCoordinator {
}
}
private boolean isOffloadEnabled() {
final TetheringConfiguration config = mDeps.getTetherConfig();
return (config != null) ? config.enableBpfOffload : true /* default value */;
}
private int getInterfaceIndexFromRules(@NonNull String ifName) {
for (LinkedHashMap<Inet6Address, Ipv6ForwardingRule> rules : mIpv6ForwardingRules
.values()) {

39
packages/Tethering/src/com/android/networkstack/tethering/Tethering.java
View File

@@ -63,6 +63,7 @@ import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
import static com.android.networkstack.tethering.TetheringNotificationUpdater.DOWNSTREAM_NONE;
import android.app.usage.NetworkStatsManager;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothPan;
import android.bluetooth.BluetoothProfile;
@@ -286,8 +287,6 @@ public class Tethering {
mUpstreamNetworkMonitor = mDeps.getUpstreamNetworkMonitor(mContext, mTetherMasterSM, mLog,
TetherMasterSM.EVENT_UPSTREAM_CALLBACK);
mForwardedDownstreams = new LinkedHashSet<>();
mBpfCoordinator = mDeps.getBpfCoordinator(
mHandler, mNetd, mLog, new BpfCoordinator.Dependencies());
IntentFilter filter = new IntentFilter();
filter.addAction(ACTION_CARRIER_CONFIG_CHANGED);
@@ -325,6 +324,37 @@ public class Tethering {
// Load tethering configuration.
updateConfiguration();
// Must be initialized after tethering configuration is loaded because BpfCoordinator
// constructor needs to use the configuration.
mBpfCoordinator = mDeps.getBpfCoordinator(
new BpfCoordinator.Dependencies() {
@NonNull
public Handler getHandler() {
return mHandler;
}
@NonNull
public INetd getNetd() {
return mNetd;
}
@NonNull
public NetworkStatsManager getNetworkStatsManager() {
return (NetworkStatsManager) mContext.getSystemService(
Context.NETWORK_STATS_SERVICE);
}
@NonNull
public SharedLog getSharedLog() {
return mLog;
}
@Nullable
public TetheringConfiguration getTetherConfig() {
return mConfig;
}
});
startStateMachineUpdaters();
}
@@ -2236,6 +2266,11 @@ public class Tethering {
mOffloadController.dump(pw);
pw.decreaseIndent();
pw.println("BPF offload:");
pw.increaseIndent();
mBpfCoordinator.dump(pw);
pw.decreaseIndent();
pw.println("Private address coordinator:");
pw.increaseIndent();
mPrivateAddressCoordinator.dump(pw);

5
packages/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
View File

@@ -46,11 +46,8 @@ public abstract class TetheringDependencies {
* Get a reference to the BpfCoordinator to be used by tethering.
*/
public @NonNull BpfCoordinator getBpfCoordinator(
@NonNull Handler handler, @NonNull INetd netd, @NonNull SharedLog log,
@NonNull BpfCoordinator.Dependencies deps) {
final NetworkStatsManager statsManager =
(NetworkStatsManager) getContext().getSystemService(Context.NETWORK_STATS_SERVICE);
return new BpfCoordinator(handler, netd, statsManager, log, deps);
return new BpfCoordinator(deps);
}
/**

42
packages/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
View File

@@ -89,12 +89,14 @@ import android.os.test.TestLooper;
import android.text.TextUtils;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.networkstack.tethering.BpfCoordinator;
import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
import com.android.networkstack.tethering.PrivateAddressCoordinator;
import com.android.networkstack.tethering.TetheringConfiguration;
import org.junit.Before;
import org.junit.Test;
@@ -226,9 +228,36 @@ public class IpServerTest {
when(mSharedLog.forSubComponent(anyString())).thenReturn(mSharedLog);
when(mAddressCoordinator.requestDownstreamAddress(any())).thenReturn(mTestAddress);
BpfCoordinator bc = new BpfCoordinator(new Handler(mLooper.getLooper()), mNetd,
mStatsManager, mSharedLog, new BpfCoordinator.Dependencies());
mBpfCoordinator = spy(bc);
mBpfCoordinator = spy(new BpfCoordinator(
new BpfCoordinator.Dependencies() {
@NonNull
public Handler getHandler() {
return new Handler(mLooper.getLooper());
}
@NonNull
public INetd getNetd() {
return mNetd;
}
@NonNull
public NetworkStatsManager getNetworkStatsManager() {
return mStatsManager;
}
@NonNull
public SharedLog getSharedLog() {
return mSharedLog;
}
@Nullable
public TetheringConfiguration getTetherConfig() {
// Returning null configuration object is a hack to enable BPF offload.
// See BpfCoordinator#isOffloadEnabled.
// TODO: Mock TetheringConfiguration to test.
return null;
}
}));
}
@Test
@@ -671,18 +700,21 @@ public class IpServerTest {
}
}
private TetherOffloadRuleParcel matches(
@NonNull
private static TetherOffloadRuleParcel matches(
int upstreamIfindex, InetAddress dst, MacAddress dstMac) {
return argThat(new TetherOffloadRuleParcelMatcher(upstreamIfindex, dst, dstMac));
}
@NonNull
private static Ipv6ForwardingRule makeForwardingRule(
int upstreamIfindex, @NonNull InetAddress dst, @NonNull MacAddress dstMac) {
return new Ipv6ForwardingRule(upstreamIfindex, TEST_IFACE_PARAMS.index,
(Inet6Address) dst, TEST_IFACE_PARAMS.macAddr, dstMac);
}
private TetherStatsParcel buildEmptyTetherStatsParcel(int ifIndex) {
@NonNull
private static TetherStatsParcel buildEmptyTetherStatsParcel(int ifIndex) {
TetherStatsParcel parcel = new TetherStatsParcel();
parcel.ifIndex = ifIndex;
return parcel;

268
packages/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
View File

@@ -31,42 +31,68 @@ import static com.android.networkstack.tethering.BpfCoordinator.StatsType;
import static com.android.networkstack.tethering.BpfCoordinator.StatsType.STATS_PER_IFACE;
import static com.android.networkstack.tethering.BpfCoordinator.StatsType.STATS_PER_UID;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertNotNull;
import static junit.framework.Assert.fail;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyLong;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.argThat;
import static org.mockito.Mockito.clearInvocations;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import android.annotation.NonNull;
import android.app.usage.NetworkStatsManager;
import android.net.INetd;
import android.net.InetAddresses;
import android.net.MacAddress;
import android.net.NetworkStats;
import android.net.TetherOffloadRuleParcel;
import android.net.TetherStatsParcel;
import android.net.ip.IpServer;
import android.net.util.SharedLog;
import android.os.Handler;
import android.os.test.TestLooper;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
import com.android.testutils.TestableNetworkStatsProviderCbBinder;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
import org.mockito.ArgumentMatcher;
import org.mockito.InOrder;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Arrays;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class BpfCoordinatorTest {
private static final int DOWNSTREAM_IFINDEX = 10;
private static final MacAddress DOWNSTREAM_MAC = MacAddress.ALL_ZEROS_ADDRESS;
private static final InetAddress NEIGH_A = InetAddresses.parseNumericAddress("2001:db8::1");
private static final InetAddress NEIGH_B = InetAddresses.parseNumericAddress("2001:db8::2");
private static final MacAddress MAC_A = MacAddress.fromString("00:00:00:00:00:0a");
private static final MacAddress MAC_B = MacAddress.fromString("11:22:33:00:00:0b");
@Mock private NetworkStatsManager mStatsManager;
@Mock private INetd mNetd;
@Mock private IpServer mIpServer;
// Late init since methods must be called by the thread that created this object.
private TestableNetworkStatsProviderCbBinder mTetherStatsProviderCb;
private BpfCoordinator.BpfTetherStatsProvider mTetherStatsProvider;
@@ -76,9 +102,37 @@ public class BpfCoordinatorTest {
private BpfCoordinator.Dependencies mDeps =
new BpfCoordinator.Dependencies() {
@Override
int getPerformPollInterval() {
public int getPerformPollInterval() {
return DEFAULT_PERFORM_POLL_INTERVAL_MS;
}
@NonNull
public Handler getHandler() {
return new Handler(mTestLooper.getLooper());
}
@NonNull
public INetd getNetd() {
return mNetd;
}
@NonNull
public NetworkStatsManager getNetworkStatsManager() {
return mStatsManager;
}
@NonNull
public SharedLog getSharedLog() {
return new SharedLog("test");
}
@Nullable
public TetheringConfiguration getTetherConfig() {
// Returning null configuration object is a hack to enable BPF offload.
// See BpfCoordinator#isOffloadEnabled.
// TODO: Mock TetheringConfiguration to test.
return null;
}
};
@Before public void setUp() {
@@ -95,9 +149,7 @@ public class BpfCoordinatorTest {
@NonNull
private BpfCoordinator makeBpfCoordinator() throws Exception {
BpfCoordinator coordinator = new BpfCoordinator(
new Handler(mTestLooper.getLooper()), mNetd, mStatsManager, new SharedLog("test"),
mDeps);
final BpfCoordinator coordinator = new BpfCoordinator(mDeps);
final ArgumentCaptor<BpfCoordinator.BpfTetherStatsProvider>
tetherStatsProviderCaptor =
ArgumentCaptor.forClass(BpfCoordinator.BpfTetherStatsProvider.class);
@@ -243,4 +295,210 @@ public class BpfCoordinatorTest {
waitForIdle();
mTetherStatsProviderCb.assertNoCallback();
}
// The custom ArgumentMatcher simply comes from IpServerTest.
// TODO: move both of them into a common utility class for reusing the code.
private static class TetherOffloadRuleParcelMatcher implements
ArgumentMatcher<TetherOffloadRuleParcel> {
public final int upstreamIfindex;
public final int downstreamIfindex;
public final Inet6Address address;
public final MacAddress srcMac;
public final MacAddress dstMac;
TetherOffloadRuleParcelMatcher(@NonNull Ipv6ForwardingRule rule) {
upstreamIfindex = rule.upstreamIfindex;
downstreamIfindex = rule.downstreamIfindex;
address = rule.address;
srcMac = rule.srcMac;
dstMac = rule.dstMac;
}
public boolean matches(@NonNull TetherOffloadRuleParcel parcel) {
return upstreamIfindex == parcel.inputInterfaceIndex
&& (downstreamIfindex == parcel.outputInterfaceIndex)
&& Arrays.equals(address.getAddress(), parcel.destination)
&& (128 == parcel.prefixLength)
&& Arrays.equals(srcMac.toByteArray(), parcel.srcL2Address)
&& Arrays.equals(dstMac.toByteArray(), parcel.dstL2Address);
}
public String toString() {
return String.format("TetherOffloadRuleParcelMatcher(%d, %d, %s, %s, %s",
upstreamIfindex, downstreamIfindex, address.getHostAddress(), srcMac, dstMac);
}
}
@NonNull
private TetherOffloadRuleParcel matches(@NonNull Ipv6ForwardingRule rule) {
return argThat(new TetherOffloadRuleParcelMatcher(rule));
}
@NonNull
private static Ipv6ForwardingRule buildTestForwardingRule(
int upstreamIfindex, @NonNull InetAddress address, @NonNull MacAddress dstMac) {
return new Ipv6ForwardingRule(upstreamIfindex, DOWNSTREAM_IFINDEX, (Inet6Address) address,
DOWNSTREAM_MAC, dstMac);
}
@Test
public void testSetDataLimit() throws Exception {
setupFunctioningNetdInterface();
final BpfCoordinator coordinator = makeBpfCoordinator();
final String mobileIface = "rmnet_data0";
final Integer mobileIfIndex = 100;
coordinator.addUpstreamNameToLookupTable(mobileIfIndex, mobileIface);
// [1] Default limit.
// Set the unlimited quota as default if the service has never applied a data limit for a
// given upstream. Note that the data limit only be applied on an upstream which has rules.
final Ipv6ForwardingRule rule = buildTestForwardingRule(mobileIfIndex, NEIGH_A, MAC_A);
final InOrder inOrder = inOrder(mNetd);
coordinator.tetherOffloadRuleAdd(mIpServer, rule);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(rule));
inOrder.verify(mNetd).tetherOffloadSetInterfaceQuota(mobileIfIndex, QUOTA_UNLIMITED);
inOrder.verifyNoMoreInteractions();
// [2] Specific limit.
// Applying the data limit boundary {min, 1gb, max, infinity} on current upstream.
for (final long quota : new long[] {0, 1048576000, Long.MAX_VALUE, QUOTA_UNLIMITED}) {
mTetherStatsProvider.onSetLimit(mobileIface, quota);
waitForIdle();
inOrder.verify(mNetd).tetherOffloadSetInterfaceQuota(mobileIfIndex, quota);
inOrder.verifyNoMoreInteractions();
}
// [3] Invalid limit.
// The valid range of quota is 0..max_int64 or -1 (unlimited).
final long invalidLimit = Long.MIN_VALUE;
try {
mTetherStatsProvider.onSetLimit(mobileIface, invalidLimit);
waitForIdle();
fail("No exception thrown for invalid limit " + invalidLimit + ".");
} catch (IllegalArgumentException expected) {
assertEquals(expected.getMessage(), "invalid quota value " + invalidLimit);
}
}
// TODO: Test the case in which the rules are changed from different IpServer objects.
@Test
public void testSetDataLimitOnRuleChange() throws Exception {
setupFunctioningNetdInterface();
final BpfCoordinator coordinator = makeBpfCoordinator();
final String mobileIface = "rmnet_data0";
final Integer mobileIfIndex = 100;
coordinator.addUpstreamNameToLookupTable(mobileIfIndex, mobileIface);
// Applying a data limit to the current upstream does not take any immediate action.
// The data limit could be only set on an upstream which has rules.
final long limit = 12345;
final InOrder inOrder = inOrder(mNetd);
mTetherStatsProvider.onSetLimit(mobileIface, limit);
waitForIdle();
inOrder.verify(mNetd, never()).tetherOffloadSetInterfaceQuota(anyInt(), anyLong());
// Adding the first rule on current upstream immediately sends the quota to netd.
final Ipv6ForwardingRule ruleA = buildTestForwardingRule(mobileIfIndex, NEIGH_A, MAC_A);
coordinator.tetherOffloadRuleAdd(mIpServer, ruleA);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(ruleA));
inOrder.verify(mNetd).tetherOffloadSetInterfaceQuota(mobileIfIndex, limit);
inOrder.verifyNoMoreInteractions();
// Adding the second rule on current upstream does not send the quota to netd.
final Ipv6ForwardingRule ruleB = buildTestForwardingRule(mobileIfIndex, NEIGH_B, MAC_B);
coordinator.tetherOffloadRuleAdd(mIpServer, ruleB);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(ruleB));
inOrder.verify(mNetd, never()).tetherOffloadSetInterfaceQuota(anyInt(), anyLong());
// Removing the second rule on current upstream does not send the quota to netd.
coordinator.tetherOffloadRuleRemove(mIpServer, ruleB);
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(ruleB));
inOrder.verify(mNetd, never()).tetherOffloadSetInterfaceQuota(anyInt(), anyLong());
// Removing the last rule on current upstream immediately sends the cleanup stuff to netd.
when(mNetd.tetherOffloadGetAndClearStats(mobileIfIndex))
.thenReturn(buildTestTetherStatsParcel(mobileIfIndex, 0, 0, 0, 0));
coordinator.tetherOffloadRuleRemove(mIpServer, ruleA);
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(ruleA));
inOrder.verify(mNetd).tetherOffloadGetAndClearStats(mobileIfIndex);
inOrder.verifyNoMoreInteractions();
}
@Test
public void testTetherOffloadRuleUpdateAndClear() throws Exception {
setupFunctioningNetdInterface();
final BpfCoordinator coordinator = makeBpfCoordinator();
final String ethIface = "eth1";
final String mobileIface = "rmnet_data0";
final Integer ethIfIndex = 100;
final Integer mobileIfIndex = 101;
coordinator.addUpstreamNameToLookupTable(ethIfIndex, ethIface);
coordinator.addUpstreamNameToLookupTable(mobileIfIndex, mobileIface);
final InOrder inOrder = inOrder(mNetd);
// Before the rule test, here are the additional actions while the rules are changed.
// - After adding the first rule on a given upstream, the coordinator adds a data limit.
// If the service has never applied the data limit, set an unlimited quota as default.
// - After removing the last rule on a given upstream, the coordinator gets the last stats.
// Then, it clears the stats and the limit entry from BPF maps.
// See tetherOffloadRule{Add, Remove, Clear, Clean}.
// [1] Adding rules on the upstream Ethernet.
// Note that the default data limit is applied after the first rule is added.
final Ipv6ForwardingRule ethernetRuleA = buildTestForwardingRule(
ethIfIndex, NEIGH_A, MAC_A);
final Ipv6ForwardingRule ethernetRuleB = buildTestForwardingRule(
ethIfIndex, NEIGH_B, MAC_B);
coordinator.tetherOffloadRuleAdd(mIpServer, ethernetRuleA);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(ethernetRuleA));
inOrder.verify(mNetd).tetherOffloadSetInterfaceQuota(ethIfIndex, QUOTA_UNLIMITED);
coordinator.tetherOffloadRuleAdd(mIpServer, ethernetRuleB);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(ethernetRuleB));
// [2] Update the existing rules from Ethernet to cellular.
final Ipv6ForwardingRule mobileRuleA = buildTestForwardingRule(
mobileIfIndex, NEIGH_A, MAC_A);
final Ipv6ForwardingRule mobileRuleB = buildTestForwardingRule(
mobileIfIndex, NEIGH_B, MAC_B);
when(mNetd.tetherOffloadGetAndClearStats(ethIfIndex))
.thenReturn(buildTestTetherStatsParcel(ethIfIndex, 10, 20, 30, 40));
// Update the existing rules for upstream changes. The rules are removed and re-added one
// by one for updating upstream interface index by #tetherOffloadRuleUpdate.
coordinator.tetherOffloadRuleUpdate(mIpServer, mobileIfIndex);
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(ethernetRuleA));
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(mobileRuleA));
inOrder.verify(mNetd).tetherOffloadSetInterfaceQuota(mobileIfIndex, QUOTA_UNLIMITED);
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(ethernetRuleB));
inOrder.verify(mNetd).tetherOffloadGetAndClearStats(ethIfIndex);
inOrder.verify(mNetd).tetherOffloadRuleAdd(matches(mobileRuleB));
// [3] Clear all rules for a given IpServer.
when(mNetd.tetherOffloadGetAndClearStats(mobileIfIndex))
.thenReturn(buildTestTetherStatsParcel(mobileIfIndex, 50, 60, 70, 80));
coordinator.tetherOffloadRuleClear(mIpServer);
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(mobileRuleA));
inOrder.verify(mNetd).tetherOffloadRuleRemove(matches(mobileRuleB));
inOrder.verify(mNetd).tetherOffloadGetAndClearStats(mobileIfIndex);
// [4] Force pushing stats update to verify that the last diff of stats is reported on all
// upstreams.
mTetherStatsProvider.pushTetherStats();
mTetherStatsProviderCb.expectNotifyStatsUpdated(
new NetworkStats(0L, 2)
.addEntry(buildTestEntry(STATS_PER_IFACE, ethIface, 10, 20, 30, 40))
.addEntry(buildTestEntry(STATS_PER_IFACE, mobileIface, 50, 60, 70, 80)),
new NetworkStats(0L, 2)
.addEntry(buildTestEntry(STATS_PER_UID, ethIface, 10, 20, 30, 40))
.addEntry(buildTestEntry(STATS_PER_UID, mobileIface, 50, 60, 70, 80)));
}
}

4
packages/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
View File

@@ -346,8 +346,8 @@ public class TetheringTest {
}
@Override
public BpfCoordinator getBpfCoordinator(Handler handler, INetd netd,
SharedLog log, BpfCoordinator.Dependencies deps) {
public BpfCoordinator getBpfCoordinator(
BpfCoordinator.Dependencies deps) {
return mBpfCoordinator;
}