On 06/25/2014 03:09 PM, Eric Blake wrote:
We publish libvirt-api.xml for others to use, and in fact, the
libvirt-python bindings use it to generate enum values. However,
we had an off-by-one bug that any enum that relied on C's rules
for implicit initialization of the first enum member to 0 got
listed in the xml as having a value of 1 (and all later members
of the enum were equally botched).
Affected are:
- virDomainCoreDumpFormat (such as VIR_DOMAIN_CORE_DUMP_FORMAT_RAW),
since libvirt TBD
commit 9fbaff0 v1.2.3
- virDomainEventGraphicsAddressType (such as
VIR_DOMAIN_EVENT_GRAPHICS_ADDRESS_IPV4), since libvirt TBD
commit 987e31e v0.8.0
- virIPAddrType (such as VIR_IP_ADDR_TYPE_IPV4), since libvirt TBD
commit 03e0e79, not yet released
The fix is simple - since we add one to the previous value when
encountering an enum without an initializer, the previous value
must start at -1 so that the first enum member is assigned 0.
Thanks to Nehal J Wani for reporting the problem on IRC, and
for helping me zero in on the culprit function.
* docs/apibuild.py (CParser.parseEnumBlock): Fix implicit enum
values.
Signed-off-by: Eric Blake <eblake(a)redhat.com>
---
I'm going to touch up the commit message before pushing, once I
do enough research on which versions of libvirt were impacted;
but I just got interrupted, so I'm posting this now to get the
review started.
Research done. Bummer that our graphics event python bindings have been
broken since 0.8.0 :(
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library
http://libvirt.org