[dpdk-dev] [PATCH 5/7] tests: Add a new MTU test.

[Mark Kavanagh <mark.b.kavanagh@intel.com>]

From: Daniele Di Proietto <diproiettod@vmware.com>

Also, netdev-dummy needs to call netdev_change_seq_changed() in
set_mtu().

Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
---
 lib/netdev-dummy.c    |  5 ++++-
 tests/ofproto-dpif.at | 30 ++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/lib/netdev-dummy.c b/lib/netdev-dummy.c
index 92af15f..c8f82b7 100644
--- a/lib/netdev-dummy.c
+++ b/lib/netdev-dummy.c
@@ -1155,7 +1155,10 @@ netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
     struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     ovs_mutex_lock(&dev->mutex);
-    dev->mtu = mtu;
+    if (dev->mtu != mtu) {
+        dev->mtu = mtu;
+        netdev_change_seq_changed(netdev);
+    }
     ovs_mutex_unlock(&dev->mutex);
 
     return 0;
diff --git a/tests/ofproto-dpif.at b/tests/ofproto-dpif.at
index a46fc81..3638063 100644
--- a/tests/ofproto-dpif.at
+++ b/tests/ofproto-dpif.at
@@ -8859,3 +8859,33 @@ n_packets=0
 
 OVS_VSWITCHD_STOP
 AT_CLEANUP
+
+AT_SETUP([ofproto - set mtu])
+OVS_VSWITCHD_START
+
+add_of_ports br0 1
+
+# Check that initial MTU is 1500 for 'br0' and 'p1'.
+AT_CHECK([ovs-vsctl get Interface br0 mtu], [0], [dnl
+1500
+])
+AT_CHECK([ovs-vsctl get Interface p1 mtu], [0], [dnl
+1500
+])
+
+# Request new MTU for 'p1'
+AT_CHECK([ovs-vsctl set Interface p1 mtu_request=1600])
+
+# Check that the new MTU is applied
+AT_CHECK([ovs-vsctl --timeout=10 wait-until Interface p1 mtu=1600])
+# The internal port 'br0' should have the same MTU value as p1, becase it's
+# the new bridge minimum.
+AT_CHECK([ovs-vsctl --timeout=10 wait-until Interface br0 mtu=1600])
+
+AT_CHECK([ovs-vsctl del-port br0 p1])
+
+# When 'p1' is deleted, the internal port should return to the default MTU
+AT_CHECK([ovs-vsctl --timeout=10 wait-until Interface br0 mtu=1500])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
-- 
1.9.3