ON-15561: Fix test_multi_ns*[ipvlan] cplane sysunit tests

The affected tests failed because they did not specify the IPVLAN
mode. The IPVLAN mode selected by default, L3 (1), is not accelerated
by Onload, that only supports L2 (0). As a result, when the test case
tried to resolve a test route, the resulting HW port mask was empty,
i.e. unexpectedly unaccelerated.

To fix it, the test case passes additional options for using the L2
mode when it creates an IPVLAN interface.

src/tests/onload/cplane_sysunit/scripts/test_cplane1.py

@@ -12,6 +12,7 @@
 from random import randint
 from pyroute2 import NetNS, netlink, IPRoute, NetlinkError
 from pyroute2.netlink.rtnl.ifaddrmsg import IFA_F_NODAD
+from pyroute2.netlink.rtnl.ifinfmsg.plugins.ipvlan import ipvlan
 from cplane import *
 
 def ip2v4(ip):
@@ -911,6 +912,18 @@ def test_nic_order(encap):
     do_test_nic_order(encap=encap)
 
 
+def link_options(kind):
+    ''' Return additional options to pass to pyroute2 when creating
+        new acceleratable interfaces (in subordinate namespaces).
+    '''
+
+    # Override the default ipvlan mode L3 because Onload supports only L2
+    if kind == 'ipvlan':
+        return {'ipvlan_mode': ipvlan.modes['IPVLAN_MODE_L2']}
+
+    return {}
+
+
 @cpdecorate(tag='main_ns')
 @cpdecorate(tag='myns', parent_tag='main_ns')
 def do_test_multi_ns(main_ns, myns, encap):
@@ -926,7 +939,7 @@ def do_test_multi_ns(main_ns, myns, encap):
 
     vifname= 'p0dmv'
     main_ns.netns.link('add', kind=encap, ifname=vifname,
-                       link=main_ix)
+                       link=main_ix, **link_options(encap))
 
     ix = main_ns.netns.link_lookup(ifname=vifname)[0]
     main_ns.netns.link('set', index=ix,
@@ -962,7 +975,8 @@ def do_test_multi_ns_bond(main_ns, myns, encap):
                                       main_ns.netns, nics=nics, address=None)
 
     main_ns.netns.link('add', kind=encap, ifname='bond2mv',
-                       link=main_ns.netns.link_lookup(ifname='bond2')[0])
+                       link=main_ns.netns.link_lookup(ifname='bond2')[0],
+                       **link_options(encap))
     main_ns.netns.link('set',
                        index=main_ns.netns.link_lookup(ifname='bond2mv')[0],
                        net_ns_fd=myns.cpserver.getNetNsPath())