Check for bpf support at NetworkStatsService start
The current implementation check for bpf map existance whenever a
NetworkStats request comes in. The check is not efficient and may
require additional permission for threads. So a member variable is added
to NetworkStatsService to store the bpf configuration status and is
initialized when NetworkStatsService start.
Test: -m CtsNetTestCases -t android.net.cts.TrafficStatsTest
-m CtsUsageStatsTestCases -t android.app.usage.cts.NetworkUsageStatsTest
Bug: 79994577
Change-Id: I872ae18fb3e9631a4e6c4d773fefbba32e60a03b
diff --git a/services/core/java/com/android/server/net/NetworkStatsService.java b/services/core/java/com/android/server/net/NetworkStatsService.java
index 9ef6c66..492c6d6 100644
--- a/services/core/java/com/android/server/net/NetworkStatsService.java
+++ b/services/core/java/com/android/server/net/NetworkStatsService.java
@@ -184,6 +184,8 @@
private final PowerManager.WakeLock mWakeLock;
+ private final boolean mUseBpfTrafficStats;
+
private IConnectivityManager mConnManager;
@VisibleForTesting
@@ -347,6 +349,7 @@
mStatsObservers = checkNotNull(statsObservers, "missing NetworkStatsObservers");
mSystemDir = checkNotNull(systemDir, "missing systemDir");
mBaseDir = checkNotNull(baseDir, "missing baseDir");
+ mUseBpfTrafficStats = new File("/sys/fs/bpf/traffic_uid_stats_map").exists();
LocalServices.addService(NetworkStatsManagerInternal.class,
new NetworkStatsManagerInternalImpl());
@@ -947,7 +950,7 @@
}
private boolean checkBpfStatsEnable() {
- return new File("/sys/fs/bpf/traffic_uid_stats_map").exists();
+ return mUseBpfTrafficStats;
}
/**