Use eBPF map data for per iface stats am: 2dc99dc445

am: 2e13ecc88d

Change-Id: If4944a4a5a0c49235731afb4ae3220cf72240a83

core/java/com/android/internal/net/NetworkStatsFactory.java

@@ -178,6 +178,14 @@ public class NetworkStatsFactory {
         return stats;
     }
 
+    public NetworkStats readBpfNetworkStatsDev() throws IOException {
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
+        if (nativeReadNetworkStatsDev(stats) != 0) {
+            throw new IOException("Failed to parse bpf iface stats");
+        }
+        return stats;
+    }
+
     /**
      * Parse and return interface-level summary {@link NetworkStats} measured
      * using {@code /proc/net/dev} style hooks, which may include non IP layer
@@ -188,9 +196,9 @@ public class NetworkStatsFactory {
      */
     public NetworkStats readNetworkStatsSummaryDev() throws IOException {
 
-        // Return the stats get from /proc/net/dev if switched to bpf module.
+        // Return xt_bpf stats if switched to bpf module.
         if (mUseBpfStats)
-            return readNetworkStatsIfaceDev();
+            return readBpfNetworkStatsDev();
 
         final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
 
@@ -244,9 +252,9 @@ public class NetworkStatsFactory {
      */
     public NetworkStats readNetworkStatsSummaryXt() throws IOException {
 
-        // Return the stats get from /proc/net/dev if qtaguid  module is replaced.
+        // Return xt_bpf stats if qtaguid  module is replaced.
         if (mUseBpfStats)
-            return readNetworkStatsIfaceDev();
+            return readBpfNetworkStatsDev();
 
         final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
 
@@ -408,4 +416,7 @@ public class NetworkStatsFactory {
     @VisibleForTesting
     public static native int nativeReadNetworkStatsDetail(NetworkStats stats, String path,
         int limitUid, String[] limitIfaces, int limitTag, boolean useBpfStats);
+
+    @VisibleForTesting
+    public static native int nativeReadNetworkStatsDev(NetworkStats stats);
 }