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vmx: fix logic handling mac address type

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With the current formatter, the XML snippets:

    <interface type='bridge'>
      <mac address='00:0c:29:dd:ee:fe' type='static'/>
      <source bridge='br1'/>
    </interface>
    <interface type='bridge'>
      <mac address='aa:bb:cc:dd:ee:fd' type='generated'/>
      <source bridge='br2'/>
    </interface>

result in

 ethernet1.present = "true"
 ethernet1.networkName = "br1"
 ethernet1.connectionType = "bridged"
 ethernet1.addressType = "static"
 ethernet1.address = "00:0c:29:dd:ee:fe"
 ethernet1.checkMACAddress = "false"

 ethernet2.present = "true"
 ethernet2.networkName = "br2"
 ethernet2.connectionType = "bridged"
 ethernet2.addressType = "static"
 ethernet2.address = "aa:bb:cc:dd:ee:fd"
 ethernet2.checkMACAddress = "false"

which is flawed, as both type='static' and type='generated' in the XML
turn into 'static' in the VMX config.

The existence of the 'static' attribute is further overriding whether
the checkMACAddress config option is set as a side effect.

Both these pieces of flawed logic were introduced in

  commit 454e5961ab
  Author: Bastien Orivel <bastien.orivel@diateam.net>
  Date:   Mon Jul 13 16:28:53 2020 +0200

    Add a type attribute on the mac address element

which intentionally added the 'checkMACAddress' side effect based on
the 'type' attribute.

With this change, we're reverting the handling of checkMACAddress
to match what existed historically. The 'type' attribute now directly
maps to the addressType attribute, so the above config becomes:

 ethernet1.present = "true"
 ethernet1.networkName = "br1"
 ethernet1.connectionType = "bridged"
 ethernet1.addressType = "static"
 ethernet1.address = "00:0c:29:dd:ee:fe"

 ethernet2.present = "true"
 ethernet2.networkName = "br2"
 ethernet2.connectionType = "bridged"
 ethernet2.addressType = "generated"
 ethernet2.generatedAddress = "aa:bb:cc:dd:ee:fd"
 ethernet2.generatedAddressOffset = "0"

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2020-07-20 15:59:51 +01:00
parent ec55001810
commit 6d3cb071b4
2 changed files with 40 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
src/vmx/vmx.c
View File

@ -3732,7 +3732,9 @@ virVMXFormatEthernet(virDomainNetDefPtr def, int controller,
virBufferPtr buffer, int virtualHW_version)
{
char mac_string[VIR_MAC_STRING_BUFLEN];
const bool staticMac = def->mac_type == VIR_DOMAIN_NET_MAC_TYPE_STATIC;
virDomainNetMacType mac_type = VIR_DOMAIN_NET_MAC_TYPE_DEFAULT;
virTristateBool mac_check = VIR_TRISTATE_BOOL_ABSENT;
bool mac_vpx = false;
unsigned int prefix, suffix;
/*
@ -3830,31 +3832,48 @@ virVMXFormatEthernet(virDomainNetDefPtr def, int controller,
prefix = (def->mac.addr[0] << 16) | (def->mac.addr[1] << 8) | def->mac.addr[2];
suffix = (def->mac.addr[3] << 16) | (def->mac.addr[4] << 8) | def->mac.addr[5];
if (prefix == 0x000c29 && !staticMac) {
virBufferAsprintf(buffer, "ethernet%d.addressType = \"generated\"\n",
controller);
virBufferAsprintf(buffer, "ethernet%d.generatedAddress = \"%s\"\n",
controller, mac_string);
virBufferAsprintf(buffer, "ethernet%d.generatedAddressOffset = \"0\"\n",
controller);
} else if (prefix == 0x005056 && suffix <= 0x3fffff && !staticMac) {
virBufferAsprintf(buffer, "ethernet%d.addressType = \"static\"\n",
controller);
virBufferAsprintf(buffer, "ethernet%d.address = \"%s\"\n",
controller, mac_string);
} else if (prefix == 0x005056 && suffix >= 0x800000 && suffix <= 0xbfffff && !staticMac) {
virBufferAsprintf(buffer, "ethernet%d.addressType = \"vpx\"\n",
controller);
/*
* Historically we've not stored all the MAC related properties
* explicitly in the XML, so we must figure out some defaults
* based on the address ranges.
*/
if (prefix == 0x000c29) {
mac_type = VIR_DOMAIN_NET_MAC_TYPE_GENERATED;
} else if (prefix == 0x005056 && suffix <= 0x3fffff) {
mac_type = VIR_DOMAIN_NET_MAC_TYPE_STATIC;
} else if (prefix == 0x005056 && suffix >= 0x800000 && suffix <= 0xbfffff) {
mac_type = VIR_DOMAIN_NET_MAC_TYPE_GENERATED;
mac_vpx = true;
} else {
mac_type = VIR_DOMAIN_NET_MAC_TYPE_STATIC;
mac_check = VIR_TRISTATE_BOOL_NO;
}
/* If explicit MAC type is set, ignore the above defaults */
if (def->mac_type != VIR_DOMAIN_NET_MAC_TYPE_DEFAULT) {
mac_type = def->mac_type;
if (mac_type == VIR_DOMAIN_NET_MAC_TYPE_GENERATED)
mac_check = VIR_TRISTATE_BOOL_ABSENT;
}
if (mac_type == VIR_DOMAIN_NET_MAC_TYPE_GENERATED) {
virBufferAsprintf(buffer, "ethernet%d.addressType = \"%s\"\n",
controller, mac_vpx ? "vpx" : "generated");
virBufferAsprintf(buffer, "ethernet%d.generatedAddress = \"%s\"\n",
controller, mac_string);
if (!mac_vpx)
virBufferAsprintf(buffer, "ethernet%d.generatedAddressOffset = \"0\"\n",
controller);
} else {
virBufferAsprintf(buffer, "ethernet%d.addressType = \"static\"\n",
controller);
virBufferAsprintf(buffer, "ethernet%d.address = \"%s\"\n",
controller, mac_string);
virBufferAsprintf(buffer, "ethernet%d.checkMACAddress = \"false\"\n",
controller);
}
if (mac_check != VIR_TRISTATE_BOOL_ABSENT)
virBufferAsprintf(buffer, "ethernet%d.checkMACAddress = \"%s\"\n",
controller,
mac_check == VIR_TRISTATE_BOOL_YES ? "true" : "false");
return 0;
}

7
tests/xml2vmxdata/xml2vmx-ethernet-mac-type.vmx
View File

@ -20,10 +20,9 @@ ethernet1.networkName = "br1"
ethernet1.connectionType = "bridged"
ethernet1.addressType = "static"
ethernet1.address = "00:0c:29:dd:ee:fe"
ethernet1.checkMACAddress = "false"
ethernet2.present = "true"
ethernet2.networkName = "br2"
ethernet2.connectionType = "bridged"
ethernet2.addressType = "static"
ethernet2.address = "aa:bb:cc:dd:ee:fd"
ethernet2.checkMACAddress = "false"
ethernet2.addressType = "generated"
ethernet2.generatedAddress = "aa:bb:cc:dd:ee:fd"
ethernet2.generatedAddressOffset = "0"