Merge changes I177ec607,I68f364b4,Ib3b9f52c,If040d61e

* changes:
  nits removing extra space, change method name, etc
  maybeLogBlockedStatusChanged multilayer requests
  Update getSignalStrengthThresholds for multilayer
  Update to unneeded for multilayered requests

services/core/java/com/android/server/ConnectivityService.java

@@ -1380,8 +1380,11 @@ public class ConnectivityService extends IConnectivityManager.Stub
             return;
         }
         final String action = blocked ? "BLOCKED" : "UNBLOCKED";
+        final NetworkRequest satisfiedRequest = nri.getSatisfiedRequest();
+        final int requestId =  satisfiedRequest != null
+                ? satisfiedRequest.requestId : nri.mRequests.get(0).requestId;
         mNetworkInfoBlockingLogs.log(String.format(
-                "%s %d(%d) on netId %d", action, nri.mUid, nri.request.requestId, net.getNetId()));
+                "%s %d(%d) on netId %d", action, nri.mUid, requestId, net.getNetId()));
     }
 
     /**
@@ -2705,7 +2708,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
      * Return an array of all current NetworkRequest sorted by request id.
      */
     @VisibleForTesting
-    protected NetworkRequestInfo[] requestsSortedById() {
+    NetworkRequestInfo[] requestsSortedById() {
         NetworkRequestInfo[] requests = new NetworkRequestInfo[0];
         requests = mNetworkRequests.values().toArray(requests);
         // Sort the array based off the NRI containing the min requestId in its requests.
@@ -3555,30 +3558,58 @@ public class ConnectivityService extends IConnectivityManager.Stub
             return false;
         }
         for (NetworkRequestInfo nri : mNetworkRequests.values()) {
-            if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) {
+            if (reason == UnneededFor.LINGER
+                    && !nri.isMultilayerRequest()
+                    && nri.mRequests.get(0).isBackgroundRequest()) {
                 // Background requests don't affect lingering.
                 continue;
             }
 
-            // If this Network is already the highest scoring Network for a request, or if
+            if (isNetworkPotentialSatisfier(nai, nri)) {
-            // there is hope for it to become one if it validated, then it is needed.
-            if (nri.request.isRequest() && nai.satisfies(nri.request) &&
-                    (nai.isSatisfyingRequest(nri.request.requestId) ||
-                    // Note that this catches two important cases:
-                    // 1. Unvalidated cellular will not be reaped when unvalidated WiFi
-                    //    is currently satisfying the request.  This is desirable when
-                    //    cellular ends up validating but WiFi does not.
-                    // 2. Unvalidated WiFi will not be reaped when validated cellular
-                    //    is currently satisfying the request.  This is desirable when
-                    //    WiFi ends up validating and out scoring cellular.
-                    nri.mSatisfier.getCurrentScore()
-                            < nai.getCurrentScoreAsValidated())) {
                 return false;
             }
         }
         return true;
     }
 
+    private boolean isNetworkPotentialSatisfier(
+            @NonNull final NetworkAgentInfo candidate, @NonNull final NetworkRequestInfo nri) {
+        // listen requests won't keep up a network satisfying it. If this is not a multilayer
+        // request, we can return immediately. For multilayer requests, we have to check to see if
+        // any of the multilayer requests may have a potential satisfier.
+        if (!nri.isMultilayerRequest() && nri.mRequests.get(0).isListen()) {
+            return false;
+        }
+        for (final NetworkRequest req : nri.mRequests) {
+            // As non-multilayer listen requests have already returned, the below would only happen
+            // for a multilayer request therefore continue to the next request if available.
+            if (req.isListen()) {
+                continue;
+            }
+            // If this Network is already the highest scoring Network for a request, or if
+            // there is hope for it to become one if it validated, then it is needed.
+            if (candidate.satisfies(req)) {
+                // As soon as a network is found that satisfies a request, return. Specifically for
+                // multilayer requests, returning as soon as a NetworkAgentInfo satisfies a request
+                // is important so as to not evaluate lower priority requests further in
+                // nri.mRequests.
+                final boolean isNetworkNeeded = candidate.isSatisfyingRequest(req.requestId)
+                        // Note that this catches two important cases:
+                        // 1. Unvalidated cellular will not be reaped when unvalidated WiFi
+                        //    is currently satisfying the request.  This is desirable when
+                        //    cellular ends up validating but WiFi does not.
+                        // 2. Unvalidated WiFi will not be reaped when validated cellular
+                        //    is currently satisfying the request.  This is desirable when
+                        //    WiFi ends up validating and out scoring cellular.
+                        || nri.mSatisfier.getCurrentScore()
+                        < candidate.getCurrentScoreAsValidated();
+                return isNetworkNeeded;
+            }
+        }
+
+        return false;
+    }
+
     private NetworkRequestInfo getNriForAppRequest(
             NetworkRequest request, int callingUid, String requestedOperation) {
         final NetworkRequestInfo nri = mNetworkRequests.get(request);
@@ -5464,6 +5495,10 @@ public class ConnectivityService extends IConnectivityManager.Stub
             this(r, null);
         }
 
+        boolean isMultilayerRequest() {
+            return mRequests.size() > 1;
+        }
+
         private List<NetworkRequest> initializeRequests(NetworkRequest r) {
             final ArrayList<NetworkRequest> tempRequests = new ArrayList<>();
             tempRequests.add(new NetworkRequest(r));
@@ -5505,7 +5540,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
         public void binderDied() {
             log("ConnectivityService NetworkRequestInfo binderDied(" +
                     mRequests + ", " + mBinder + ")");
-            releaseNetworkRequest(mRequests);
+            releaseNetworkRequests(mRequests);
         }
 
         @Override
@@ -5538,13 +5573,15 @@ public class ConnectivityService extends IConnectivityManager.Stub
         mAppOpsManager.checkPackage(callerUid, callerPackageName);
     }
 
-    private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) {
+    private ArrayList<Integer> getSignalStrengthThresholds(@NonNull final NetworkAgentInfo nai) {
         final SortedSet<Integer> thresholds = new TreeSet<>();
         synchronized (nai) {
-            for (NetworkRequestInfo nri : mNetworkRequests.values()) {
+            for (final NetworkRequestInfo nri : mNetworkRequests.values()) {
-                if (nri.request.networkCapabilities.hasSignalStrength() &&
+                for (final NetworkRequest req : nri.mRequests) {
-                        nai.satisfiesImmutableCapabilitiesOf(nri.request)) {
+                    if (req.networkCapabilities.hasSignalStrength()
-                    thresholds.add(nri.request.networkCapabilities.getSignalStrength());
+                            && nai.satisfiesImmutableCapabilitiesOf(req)) {
+                        thresholds.add(req.networkCapabilities.getSignalStrength());
+                    }
                 }
             }
         }
@@ -5831,7 +5868,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
         return mNextNetworkProviderId.getAndIncrement();
     }
 
-    private void releaseNetworkRequest(List<NetworkRequest> networkRequests) {
+    private void releaseNetworkRequests(List<NetworkRequest> networkRequests) {
         for (int i = 0; i < networkRequests.size(); i++) {
             releaseNetworkRequest(networkRequests.get(i));
         }

tests/net/java/com/android/server/ConnectivityServiceTest.java

@@ -8109,7 +8109,16 @@ public class ConnectivityServiceTest {
 
     @Test
     public void testDumpDoesNotCrash() {
-        StringWriter stringWriter = new StringWriter();
+        // Filing a couple requests prior to testing the dump.
+        final TestNetworkCallback genericNetworkCallback = new TestNetworkCallback();
+        final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
+        final NetworkRequest genericRequest = new NetworkRequest.Builder()
+                .clearCapabilities().build();
+        final NetworkRequest wifiRequest = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI).build();
+        mCm.registerNetworkCallback(genericRequest, genericNetworkCallback);
+        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
+        final StringWriter stringWriter = new StringWriter();
 
         mService.dump(new FileDescriptor(), new PrintWriter(stringWriter), new String[0]);
 
@@ -8131,11 +8140,11 @@ public class ConnectivityServiceTest {
         mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
         mCm.registerNetworkCallback(cellRequest, cellNetworkCallback);
 
-        ConnectivityService.NetworkRequestInfo[] nriOutput = mService.requestsSortedById();
+        final ConnectivityService.NetworkRequestInfo[] nriOutput = mService.requestsSortedById();
 
         assertTrue(nriOutput.length > 1);
         for (int i = 0; i < nriOutput.length - 1; i++) {
-            boolean isRequestIdInOrder =
+            final boolean isRequestIdInOrder =
                     nriOutput[i].mRequests.get(0).requestId
                             < nriOutput[i + 1].mRequests.get(0).requestId;
             assertTrue(isRequestIdInOrder);