Merge "Track interfaces and roaming changed event history"

services/core/java/com/android/server/net/NetworkPolicyLogger.java

@@ -38,6 +38,7 @@ import android.app.ActivityManager;
 import android.app.ActivityManager.ProcessCapability;
 import android.net.NetworkPolicyManager;
 import android.os.UserHandle;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.Slog;
 
@@ -79,6 +80,8 @@ public class NetworkPolicyLogger {
     private static final int EVENT_APP_IDLE_WL_CHANGED = 14;
     private static final int EVENT_METERED_ALLOWLIST_CHANGED = 15;
     private static final int EVENT_METERED_DENYLIST_CHANGED = 16;
+    private static final int EVENT_ROAMING_CHANGED = 17;
+    private static final int EVENT_INTERFACES_CHANGED = 18;
 
     private final LogBuffer mNetworkBlockedBuffer = new LogBuffer(MAX_NETWORK_BLOCKED_LOG_SIZE);
     private final LogBuffer mUidStateChangeBuffer = new LogBuffer(MAX_LOG_SIZE);
@@ -265,6 +268,24 @@ public class NetworkPolicyLogger {
         }
     }
 
+    void roamingChanged(int netId, boolean newRoaming) {
+        synchronized (mLock) {
+            if (LOGD || mDebugUid != INVALID_UID) {
+                Slog.d(TAG, getRoamingChangedLog(netId, newRoaming));
+            }
+            mEventsBuffer.roamingChanged(netId, newRoaming);
+        }
+    }
+
+    void interfacesChanged(int netId, ArraySet<String> newIfaces) {
+        synchronized (mLock) {
+            if (LOGD || mDebugUid != INVALID_UID) {
+                Slog.d(TAG, getInterfacesChangedLog(netId, newIfaces.toString()));
+            }
+            mEventsBuffer.interfacesChanged(netId, newIfaces.toString());
+        }
+    }
+
     void setDebugUid(int uid) {
         mDebugUid = uid;
     }
@@ -348,6 +369,14 @@ public class NetworkPolicyLogger {
         return "metered-denylist for " + uid + " changed to " + added;
     }
 
+    private static String getRoamingChangedLog(int netId, boolean newRoaming) {
+        return "Roaming of netId=" + netId + " changed to " + newRoaming;
+    }
+
+    private static String getInterfacesChangedLog(int netId, String newIfaces) {
+        return "Interfaces of netId=" + netId + " changed to " + newIfaces;
+    }
+
     private static String getFirewallChainName(int chain) {
         switch (chain) {
             case FIREWALL_CHAIN_DOZABLE:
@@ -570,6 +599,28 @@ public class NetworkPolicyLogger {
             data.timeStamp = System.currentTimeMillis();
         }
 
+        public void roamingChanged(int netId, boolean newRoaming) {
+            final Data data = getNextSlot();
+            if (data == null) return;
+
+            data.reset();
+            data.type = EVENT_ROAMING_CHANGED;
+            data.ifield1 = netId;
+            data.bfield1 = newRoaming;
+            data.timeStamp = System.currentTimeMillis();
+        }
+
+        public void interfacesChanged(int netId, String newIfaces) {
+            final Data data = getNextSlot();
+            if (data == null) return;
+
+            data.reset();
+            data.type = EVENT_INTERFACES_CHANGED;
+            data.ifield1 = netId;
+            data.sfield1 = newIfaces;
+            data.timeStamp = System.currentTimeMillis();
+        }
+
         public void reverseDump(IndentingPrintWriter pw) {
             final Data[] allData = toArray();
             for (int i = allData.length - 1; i >= 0; --i) {
@@ -621,6 +672,10 @@ public class NetworkPolicyLogger {
                     return getMeteredAllowlistChangedLog(data.ifield1, data.bfield1);
                 case EVENT_METERED_DENYLIST_CHANGED:
                     return getMeteredDenylistChangedLog(data.ifield1, data.bfield1);
+                case EVENT_ROAMING_CHANGED:
+                    return getRoamingChangedLog(data.ifield1, data.bfield1);
+                case EVENT_INTERFACES_CHANGED:
+                    return getInterfacesChangedLog(data.ifield1, data.sfield1);
                 default:
                     return String.valueOf(data.type);
             }

services/core/java/com/android/server/net/NetworkPolicyManagerService.java

@@ -1382,8 +1382,17 @@ public class NetworkPolicyManagerService extends INetworkPolicyManager.Stub {
                 final boolean roamingChanged = updateCapabilityChange(
                         mNetworkRoaming, newRoaming, network);
 
-                if (meteredChanged || roamingChanged) {
+                final boolean shouldUpdateNetworkRules = meteredChanged || roamingChanged;
+
+                if (meteredChanged) {
                     mLogger.meterednessChanged(network.getNetId(), newMetered);
+                }
+
+                if (roamingChanged) {
+                    mLogger.roamingChanged(network.getNetId(), newRoaming);
+                }
+
+                if (shouldUpdateNetworkRules) {
                     updateNetworkRulesNL();
                 }
             }
@@ -1396,6 +1405,7 @@ public class NetworkPolicyManagerService extends INetworkPolicyManager.Stub {
                 final boolean ifacesChanged = updateNetworkToIfacesNL(network.getNetId(),
                         newIfaces);
                 if (ifacesChanged) {
+                    mLogger.interfacesChanged(network.getNetId(), newIfaces);
                     updateNetworkRulesNL();
                 }
             }