Merge "Fixed dangling network agent issue" (4088b2cd) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/dataconnection/DataConnection.java

+51 −3

Original line number	Diff line number	Diff line
		@@ -59,6 +59,7 @@ import android.telephony.data.DataProfile;
		import android.telephony.data.DataService;
		import android.telephony.data.DataServiceCallback;
		import android.text.TextUtils;
		import android.util.LocalLog;
		import android.util.Pair;
		import android.util.StatsLog;
		import android.util.TimeUtils;
		@@ -178,6 +179,8 @@ public class DataConnection extends StateMachine {

		private final String mTagSuffix;

		private final LocalLog mHandoverLocalLog = new LocalLog(100);

		/**
		* Used internally for saving connecting parameters.
		*/
		@@ -684,6 +687,7 @@ public class DataConnection extends StateMachine {
		linkProperties = dc.getLinkProperties();
		// Preserve the potential network agent from the source data connection. The ownership
		// is not transferred at this moment.
		mHandoverLocalLog.log("Handover started. Preserved the agent.");
		mHandoverSourceNetworkAgent = dc.getNetworkAgent();
		log("Get the handover source network agent: " + mHandoverSourceNetworkAgent);
		dc.setHandoverState(HANDOVER_STATE_BEING_TRANSFERRED);
		@@ -1685,6 +1689,31 @@ public class DataConnection extends StateMachine {
		mHandoverState = HANDOVER_STATE_COMPLETED;
		}

		// Check for dangling agent. Ideally the handover source agent should be null if
		// handover process is smooth. When it's not null, that means handover failed. The
		// agent was not successfully transferred to the new data connection. We should
		// gracefully notify connectivity service the network was disconnected.
		if (mHandoverSourceNetworkAgent != null) {
		DataConnection sourceDc = mHandoverSourceNetworkAgent.getDataConnection();
		if (sourceDc != null) {
		// If the source data connection still owns this agent, then just reset the
		// handover state back to idle because handover is already failed.
		mHandoverLocalLog.log(
		"Handover failed. Reset the source dc state to idle");
		sourceDc.setHandoverState(HANDOVER_STATE_IDLE);
		} else {
		// The agent is now a dangling agent. No data connection owns this agent.
		// Gracefully notify connectivity service disconnected.
		mHandoverLocalLog.log(
		"Handover failed and dangling agent found.");
		mHandoverSourceNetworkAgent.acquireOwnership(
		DataConnection.this, mTransportType);
		mHandoverSourceNetworkAgent.sendNetworkInfo(mNetworkInfo, DataConnection.this);
		mHandoverSourceNetworkAgent.releaseOwnership(DataConnection.this);
		}
		mHandoverSourceNetworkAgent = null;
		}

		if (mConnectionParams != null) {
		if (DBG) {
		log("DcInactiveState: enter notifyConnectCompleted +ALL failCause="
		@@ -1959,7 +1988,9 @@ public class DataConnection extends StateMachine {
		}

		if (mHandoverSourceNetworkAgent != null) {
		log("Transfer network agent successfully.");
		String logStr = "Transfer network agent successfully.";
		log(logStr);
		mHandoverLocalLog.log(logStr);
		mNetworkAgent = mHandoverSourceNetworkAgent;
		mNetworkAgent.acquireOwnership(DataConnection.this, mTransportType);

		@@ -1973,7 +2004,9 @@ public class DataConnection extends StateMachine {
		mNetworkAgent.sendLinkProperties(mLinkProperties, DataConnection.this);
		mHandoverSourceNetworkAgent = null;
		} else {
		loge("Failed to get network agent from original data connection");
		String logStr = "Failed to get network agent from original data connection";
		loge(logStr);
		mHandoverLocalLog.log(logStr);
		return;
		}
		} else {
		@@ -2589,6 +2622,8 @@ public class DataConnection extends StateMachine {
		}

		void setHandoverState(@HandoverState int state) {
		mHandoverLocalLog.log("State changed from " + handoverStateToString(mHandoverState)
		+ " to " + handoverStateToString(state));
		mHandoverState = state;
		}

		@@ -2812,6 +2847,15 @@ public class DataConnection extends StateMachine {
		return score;
		}

		private String handoverStateToString(@HandoverState int state) {
		switch (state) {
		case HANDOVER_STATE_IDLE: return "IDLE";
		case HANDOVER_STATE_BEING_TRANSFERRED: return "BEING_TRANSFERRED";
		case HANDOVER_STATE_COMPLETED: return "COMPLETED";
		default: return "UNKNOWN";
		}
		}

		/**
		* Dump the current state.
		*
		@@ -2841,7 +2885,7 @@ public class DataConnection extends StateMachine {
		pw.println("mLinkProperties=" + mLinkProperties);
		pw.flush();
		pw.println("mDataRegState=" + mDataRegState);
		pw.println("mHandoverState=" + mHandoverState);
		pw.println("mHandoverState=" + handoverStateToString(mHandoverState));
		pw.println("mRilRat=" + mRilRat);
		pw.println("mNetworkCapabilities=" + getNetworkCapabilities());
		pw.println("mCreateTime=" + TimeUtils.logTimeOfDay(mCreateTime));
		@@ -2859,6 +2903,10 @@ public class DataConnection extends StateMachine {
		if (mNetworkAgent != null) {
		mNetworkAgent.dump(fd, pw, args);
		}
		pw.println("handover local log:");
		pw.increaseIndent();
		mHandoverLocalLog.dump(fd, pw, args);
		pw.decreaseIndent();
		pw.decreaseIndent();
		pw.println();
		pw.flush();

src/java/com/android/internal/telephony/dataconnection/DcNetworkAgent.java

+7 −0

Original line number	Diff line number	Diff line
		@@ -132,6 +132,13 @@ public class DcNetworkAgent extends NetworkAgent {
		mDataConnection = null;
		}

		/**
		* @return The data connection that owns this agent
		*/
		public synchronized DataConnection getDataConnection() {
		return mDataConnection;
		}

		@Override
		protected synchronized void unwanted() {
		if (mDataConnection == null) {