[libvirt] [PATCH 09/10] linkstate: qemu: Add detection of link state setting capability.

[Eric Blake]

On 08/11/2011 09:27 AM, Peter Krempa wrote:
> Adds a capability flag based on version number to detect if qemu
> supports setting link state.
> ---
>   src/qemu/qemu_capabilities.c |    5 +++++
>   src/qemu/qemu_capabilities.h |    1 +
>   2 files changed, 6 insertions(+), 0 deletions(-)

No testsuite changes to validate that the new capability is detected?

> @@ -1033,6 +1034,10 @@ qemuCapsComputeCmdFlags(const char *help,
>
>       if (version>= 13000)
>           qemuCapsSet(flags, QEMU_CAPS_PCI_MULTIFUNCTION);
> +
> +    /* link state modification appeared before 0.11.0*/
> +    if (version>= 11000)
> +        qemuCapsSet(flags, QEMU_CAPS_LINK_SET);

Version checks are not nice (they are okay as a last resort, though). 
Is there is anything nicer that we could use?  Also, how do you plan to 
set link=down at boot from the command line, or can link state only be 
changed via monitor command?

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org