No need to restart DB / OVS on changing dscp value.

With this change there is no need to restart the DB or OVS on configuring a
different value for the manager or controller connection respectively. On
detecting a change in the dscp value on the socket, the previous socket is
closed and a new socket is created and connection is established with the new
configured dscp value.

Signed-off-by: Mehak Mahajan <mmahajan@nicira.com>

diff --git a/lib/jsonrpc.c b/lib/jsonrpc.c
index 5c3359c..ce5d2b4 100644 (file)
--- a/lib/jsonrpc.c
+++ b/lib/jsonrpc.c
@@ -1058,5 +1058,8 @@ void
 jsonrpc_session_set_dscp(struct jsonrpc_session *s,
                          uint8_t dscp)
 {
-    s->dscp = dscp;
+    if (s->dscp != dscp) {
+        jsonrpc_session_force_reconnect(s);
+        s->dscp = dscp;
+    }
 }

diff --git a/lib/rconn.c b/lib/rconn.c
index 2ddfc69..3241ab8 100644 (file)
--- a/lib/rconn.c
+++ b/lib/rconn.c
@@ -226,6 +226,12 @@ rconn_set_dscp(struct rconn *rc, uint8_t dscp)
     rc->dscp = dscp;
 }
 
+uint8_t
+rconn_get_dscp(const struct rconn *rc)
+{
+    return rc->dscp;
+}
+
 void
 rconn_set_probe_interval(struct rconn *rc, int probe_interval)
 {

diff --git a/lib/rconn.h b/lib/rconn.h
index 2b1332c..e4b73fc 100644 (file)
--- a/lib/rconn.h
+++ b/lib/rconn.h
@@ -40,6 +40,7 @@ struct rconn_packet_counter;
 struct rconn *rconn_create(int inactivity_probe_interval,
                           int max_backoff, uint8_t dscp);
 void rconn_set_dscp(struct rconn *rc, uint8_t dscp);
+uint8_t rconn_get_dscp(const struct rconn *rc);
 void rconn_set_max_backoff(struct rconn *, int max_backoff);
 int rconn_get_max_backoff(const struct rconn *);
 void rconn_set_probe_interval(struct rconn *, int inactivity_probe_interval);

diff --git a/ofproto/connmgr.c b/ofproto/connmgr.c
index a0315b2..8cdaa1f 100644 (file)
--- a/ofproto/connmgr.c
+++ b/ofproto/connmgr.c
@@ -1114,6 +1114,12 @@ ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
     rconn_set_probe_interval(ofconn->rconn, probe_interval);
 
     ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
+
+    /* If dscp value changed reconnect. */
+    if (c->dscp != rconn_get_dscp(ofconn->rconn)) {
+        rconn_set_dscp(ofconn->rconn, c->dscp);
+        rconn_reconnect(ofconn->rconn);
+    }
 }
 
 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index 32d4c59..15f162a 100644 (file)
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -2756,10 +2756,9 @@
         Service (QoS) on IP networks.
 
         The DSCP value specified here is used when establishing the connection
-        between the controller and the Open vSwitch.  The connection must be
-        reset for the new DSCP values to take effect.  If no value is
-        specified, a default value of 48 is chosen.  Valid DSCP values must be
-        in the range 0 to 63.
+        between the controller and the Open vSwitch.  If no value is specified,
+        a default value of 48 is chosen.  Valid DSCP values must be in the
+        range 0 to 63.
       </column>
     </group>
 
@@ -3003,10 +3002,9 @@
         Service (QoS) on IP networks.
 
         The DSCP value specified here is used when establishing the connection
-        between the manager and the Open vSwitch.  The connection must be
-        reset for the new DSCP values to take effect.  If no value is
-        specified, a default value of 48 is chosen.  Valid DSCP values must be
-        in the range 0 to 63.
+        between the manager and the Open vSwitch.  If no value is specified, a
+        default value of 48 is chosen.  Valid DSCP values must be in the range
+        0 to 63.
       </column>
     </group>