[libvirt] [PATCH 2/4] conf: Parse and format disk <wwn>
Eric Blake
eblake at redhat.com
Thu Aug 30 16:23:52 UTC 2012
On 08/30/2012 09:14 AM, Paolo Bonzini wrote:
> Il 29/08/2012 18:36, Osier Yang ha scritto:
>> @@ -11557,6 +11564,7 @@ virDomainDiskDefFormat(virBufferPtr buf,
>> if (def->transient)
>> virBufferAddLit(buf, " <transient/>\n");
>> virBufferEscapeString(buf, " <serial>%s</serial>\n", def->serial);
>> + virBufferEscapeString(buf, " <wwn>%s</wwn>\n", def->wwn);
>
> What happens if the wwn was not passed?
virBufferEscapeString() is magic - if def->wwn is NULL, then the entire
output string is omitted from buf. We use that idiom all over the place.
>
> If it is NULL, it's a bug (same for serial).
>
> If it is empty, the output will not obey the schema, so the whole
> element should be left out.
Yep, that is what will happen, with the code as-is.
--
Eric Blake eblake at redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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