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Description of problem:
An incorrect enum value causes extra bits to be set in the qemu capabilities mask of libvirt. It is possible to write an XML file that tries to use the capabilities that the bug said were present, but which are not supported by the system's qemu.
Version-Release number of selected component (if applicable):
libvirt-0.8.1-2.el6
qemu-kvm-0.12.3
How reproducible:
always
Steps to Reproduce:
1. Use libvirt to set up a domain run by a version of qemu-kvm that supports virtio networking (corresponding to QEMUD_CMD_FLAG_VNET_HOST in libvirt 0.8.1 qemu_conf.h).
Actual results:
Because the vnet-host bit was improperly defined with sign-extension, higher bits like QEMUD_CMD_FLAG_RTC_TD_HACK will be set, even if qemu does not support -rtc-td-hack.
Expected results:
Detecting vnet-host support should not detect unrelated qemu features.
Additional info:
Proposed upstream patch:
https://www.redhat.com/archives/libvir-list/2010-May/msg00377.html
Comment 2RHEL Program Management
2010-05-13 21:45:37 UTC
This feature request did not get resolved in time for Feature Freeze
for the current Red Hat Enterprise Linux release and has now been
denied. You may re-open your request by requesting your support
representative to propose it for the next release.
Silly bug bot seeing the word 'feature' and adding the FutureFeature keyword.
Comment 4RHEL Program Management
2010-05-13 22:54:27 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
inclusion.
Created attachment 415268[details]
qemu_conf: fix flag value
Upstream patch had merge conflicts with RHEL-6 spice patches; this attachment applies cleanly to 0.8.1-6.el6 sources.
Verified with libvirt-0.8.1-9.el6.x86_64. Moving to VERIFIED.
# virsh start rhel6
Domain rhel6 started
# ps -ef|grep qemu-kvm
...
-netdev tap,fd=25,id=hostnet1,vhost=on,vhostfd=26
...
Comment 11releng-rhel@redhat.com
2010-07-02 19:33:34 UTC
Red Hat Enterprise Linux Beta 2 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.