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virNetDevOpenvswitchUpdateVlan: fix vlan tag update error

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We try to update vlan tag by running virsh update-device command,
libvirtd will report ovs-vsctl arguments error. Vlan tag update
funtion does't consider the xml with no vlan configured circumstances.

The steps to reproduce the problem:
1 define and start domain with its vlan configured as:
    <interface type='bridge'>
      <mac address='52:54:00:9e:bb:ac'/>
      <source bridge='ovs-br0'/>
      <vlan>
        <tag id='10'/>
      </vlan>
      <virtualport type='openvswitch'>
      </virtualport>
      <target dev='vnet4.0'/>
      <model type='virtio'/>
      <driver name='vhost'/>
    </interface>
2 define and run virsh update-device command with no vlan configured as:
    <interface type='bridge'>
      <mac address='52:54:00:9e:bb:ac'/>
      <source bridge='ovs-br0'/>
      <virtualport type='openvswitch'>
      </virtualport>
      <target dev='vnet4.0'/>
      <model type='virtio'/>
      <driver name='vhost'/>
    </interface>
   #virsh update-device dom-id novlan.xml
3 virsh command returned error, and we got an error in libvirtd.log:
  error : virCommandWait:2584 : internal error: exit status 1: ovs-vsctl: 'set' command requires at least 3 arguments
  . Child process (ovs-vsctl --timeout=5 -- --if-exists clear Port vnet4.0 tag -- --if-exists clear Port vnet4.0 trunk
  -- --if-exists clear Port vnet4.0 vlan_mode -- --if-exists set Port vnet4.0) unexpected
  error : virNetDevOpenvswitchUpdateVlan:540 : internal error: Unable to set vlan configuration on port vnet4.0

Signed-off-by: Tu Qiang <tu.qiang35@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
tuqiang 2022-02-09 18:59:34 +08:00 committed by Michal Privoznik
parent 89b8b3662e
commit 21c55a45ef
1 changed files with 4 additions and 2 deletions
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6
src/util/virnetdevopenvswitch.c
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@ -605,8 +605,10 @@ int virNetDevOpenvswitchUpdateVlan(const char *ifname,
virCommandAddArgList(cmd,
"--", "--if-exists", "clear", "Port", ifname, "tag",
"--", "--if-exists", "clear", "Port", ifname, "trunk",
"--", "--if-exists", "clear", "Port", ifname, "vlan_mode",
"--", "--if-exists", "set", "Port", ifname, NULL);
"--", "--if-exists", "clear", "Port", ifname, "vlan_mode", NULL);
if (virtVlan && virtVlan->nTags > 0)
virCommandAddArgList(cmd, "--", "--if-exists", "set", "Port", ifname, NULL);
virNetDevOpenvswitchConstructVlans(cmd, virtVlan);