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Merge "BpfCoordinator: avoid attach/deatach duplicate downstream program"

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Treehugger Robot
2022-08-06 11:05:35 +00:00
committed by Gerrit Code Review
parent 5a316a06e0 6f54391340
commit 896b893500
2 changed files with 44 additions and 14 deletions
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15
Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
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@@ -905,10 +905,16 @@ public class BpfCoordinator {
if (forwardingPairExists(intIface, extIface)) return;
boolean firstUpstreamForThisDownstream = !isAnyForwardingPairOnDownstream(intIface);
boolean firstDownstreamForThisUpstream = !isAnyForwardingPairOnUpstream(extIface);
forwardingPairAdd(intIface, extIface);
// Attach if the downstream is the first time to be used in a forwarding pair.
// Ex: IPv6 only interface has two forwarding pair, iface and v4-iface, on the
// same downstream.
if (firstUpstreamForThisDownstream) {
mBpfCoordinatorShim.attachProgram(intIface, UPSTREAM);
}
// Attach if the upstream is the first time to be used in a forwarding pair.
if (firstDownstreamForThisUpstream) {
mBpfCoordinatorShim.attachProgram(extIface, DOWNSTREAM);
@@ -922,7 +928,9 @@ public class BpfCoordinator {
forwardingPairRemove(intIface, extIface);
// Detaching program may fail because the interface has been removed already.
if (!isAnyForwardingPairOnDownstream(intIface)) {
mBpfCoordinatorShim.detachProgram(intIface);
}
// Detach if no more forwarding pair is using the upstream.
if (!isAnyForwardingPairOnUpstream(extIface)) {
mBpfCoordinatorShim.detachProgram(extIface);
@@ -1827,6 +1835,13 @@ public class BpfCoordinator {
return mForwardingPairs.containsKey(extIface);
}
private boolean isAnyForwardingPairOnDownstream(@NonNull String intIface) {
for (final HashSet downstreams : mForwardingPairs.values()) {
if (downstreams.contains(intIface)) return true;
}
return false;
}
@NonNull
private NetworkStats buildNetworkStats(@NonNull StatsType type, int ifIndex,
@NonNull final ForwardedStats diff) {

39
Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
View File

@@ -1277,47 +1277,62 @@ public class BpfCoordinatorTest {
try {
final String intIface1 = "wlan1";
final String intIface2 = "rndis0";
final String extIface = "rmnet_data0";
final String extIface1 = "rmnet_data0";
final String extIface2 = "v4-rmnet_data0";
final String virtualIface = "ipsec0";
final BpfUtils mockMarkerBpfUtils = staticMockMarker(BpfUtils.class);
final BpfCoordinator coordinator = makeBpfCoordinator();
// [1] Add the forwarding pair <wlan1, rmnet_data0>. Expect that attach both wlan1 and
// rmnet_data0.
coordinator.maybeAttachProgram(intIface1, extIface);
ExtendedMockito.verify(() -> BpfUtils.attachProgram(extIface, DOWNSTREAM));
coordinator.maybeAttachProgram(intIface1, extIface1);
ExtendedMockito.verify(() -> BpfUtils.attachProgram(extIface1, DOWNSTREAM));
ExtendedMockito.verify(() -> BpfUtils.attachProgram(intIface1, UPSTREAM));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [2] Add the forwarding pair <wlan1, rmnet_data0> again. Expect no more action.
coordinator.maybeAttachProgram(intIface1, extIface);
coordinator.maybeAttachProgram(intIface1, extIface1);
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [3] Add the forwarding pair <rndis0, rmnet_data0>. Expect that attach rndis0 only.
coordinator.maybeAttachProgram(intIface2, extIface);
coordinator.maybeAttachProgram(intIface2, extIface1);
ExtendedMockito.verify(() -> BpfUtils.attachProgram(intIface2, UPSTREAM));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [4] Remove the forwarding pair <rndis0, rmnet_data0>. Expect detach rndis0 only.
coordinator.maybeDetachProgram(intIface2, extIface);
// [4] Add the forwarding pair <rndis0, v4-rmnet_data0>. Expect that attach
// v4-rmnet_data0 only.
coordinator.maybeAttachProgram(intIface2, extIface2);
ExtendedMockito.verify(() -> BpfUtils.attachProgram(extIface2, DOWNSTREAM));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [5] Remove the forwarding pair <rndis0, v4-rmnet_data0>. Expect detach
// v4-rmnet_data0 only.
coordinator.maybeDetachProgram(intIface2, extIface2);
ExtendedMockito.verify(() -> BpfUtils.detachProgram(extIface2));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [6] Remove the forwarding pair <rndis0, rmnet_data0>. Expect detach rndis0 only.
coordinator.maybeDetachProgram(intIface2, extIface1);
ExtendedMockito.verify(() -> BpfUtils.detachProgram(intIface2));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [5] Remove the forwarding pair <wlan1, rmnet_data0>. Expect that detach both wlan1
// [7] Remove the forwarding pair <wlan1, rmnet_data0>. Expect that detach both wlan1
// and rmnet_data0.
coordinator.maybeDetachProgram(intIface1, extIface);
ExtendedMockito.verify(() -> BpfUtils.detachProgram(extIface));
coordinator.maybeDetachProgram(intIface1, extIface1);
ExtendedMockito.verify(() -> BpfUtils.detachProgram(extIface1));
ExtendedMockito.verify(() -> BpfUtils.detachProgram(intIface1));
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);
// [6] Skip attaching if upstream is virtual interface.
// [8] Skip attaching if upstream is virtual interface.
coordinator.maybeAttachProgram(intIface1, virtualIface);
ExtendedMockito.verify(() -> BpfUtils.attachProgram(extIface, DOWNSTREAM), never());
ExtendedMockito.verify(() -> BpfUtils.attachProgram(extIface1, DOWNSTREAM), never());
ExtendedMockito.verify(() -> BpfUtils.attachProgram(intIface1, UPSTREAM), never());
ExtendedMockito.verifyNoMoreInteractions(mockMarkerBpfUtils);
ExtendedMockito.clearInvocations(mockMarkerBpfUtils);