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Merge "Inline readNetworkStatsDetailInternal, make mUseBpfStats final"

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This commit is contained in:
Benedict Wong
2019-06-20 20:25:31 +00:00
committed by Gerrit Code Review
parent 812ffea029 d749767f44
commit b8f3f2446e
1 changed files with 12 additions and 19 deletions
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31
services/core/java/com/android/server/net/NetworkStatsFactory.java
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@@ -68,7 +68,7 @@ public class NetworkStatsFactory {
/** Path to {@code /proc/net/xt_qtaguid/stats}. */
private final File mStatsXtUid;
private boolean mUseBpfStats;
private final boolean mUseBpfStats;
private INetd mNetdService;
@@ -302,6 +302,17 @@ public class NetworkStatsFactory {
return readNetworkStatsDetail(UID_ALL, INTERFACES_ALL, TAG_ALL);
}
@GuardedBy("sPersistentDataLock")
private void requestSwapActiveStatsMapLocked() throws RemoteException {
// Ask netd to do a active map stats swap. When the binder call successfully returns,
// the system server should be able to safely read and clean the inactive map
// without race problem.
if (mNetdService == null) {
mNetdService = NetdService.getInstance();
}
mNetdService.trafficSwapActiveStatsMap();
}
/**
* Reads the detailed UID stats based on the provided parameters
*
@@ -312,24 +323,6 @@ public class NetworkStatsFactory {
* @return the NetworkStats instance containing network statistics at the present time.
*/
public NetworkStats readNetworkStatsDetail(
int limitUid, @Nullable String[] limitIfaces, int limitTag) throws IOException {
return readNetworkStatsDetailInternal(limitUid, limitIfaces, limitTag);
}
@GuardedBy("sPersistentDataLock")
private void requestSwapActiveStatsMapLocked() throws RemoteException {
// Ask netd to do a active map stats swap. When the binder call successfully returns,
// the system server should be able to safely read and clean the inactive map
// without race problem.
if (mUseBpfStats) {
if (mNetdService == null) {
mNetdService = NetdService.getInstance();
}
mNetdService.trafficSwapActiveStatsMap();
}
}
private NetworkStats readNetworkStatsDetailInternal(
int limitUid, String[] limitIfaces, int limitTag) throws IOException {
// In order to prevent deadlocks, anything protected by this lock MUST NOT call out to other
// code that will acquire other locks within the system server. See b/134244752.