[Qemu-devel] [RFC 0/2] qemu-ga: add guest-network-set-interface command

[Chen Fan]

Nowadays, qemu has supported physical NIC hotplug for high network
throughput. but it's in conflict with live migration feature, to keep
network connectivity, we could to create bond device interface which
provides a mechanism for enslaving multiple network interfaces into a
single "bond" interface. the active-backup mode can be used for an
automatic switch. so this patch is adding a guest-network-set-interface
command for creating bond device. so the management can easy to create
a bond device dynamically when guest running.

we can specify:

add interface:
{"execute":"guest-network-set-interface", "arguments":
{"interface": {"type":"bond", "name":"bond0", "onboot":"onboot",
 "options":"mode=active-backup primary=eth1 miimon=100 updelay=10 
use_carrier=ioctl",
 "ip-address": {"ip-address":"192.168.122.89", "ip-address-type":"ipv4", 
"prefix":24,
 "gateway":"192.168.122.1"}, "subInterfaces":[{"name":"eth0"}, 
{"name":"eth1"}]}}}

delete interface:
{"execute":"guest-network-delete-interface", "arguments":{"name":"bond0"}}

Note:
this patch has introduces netcf lib for create interfaces. because
the netcf provides a convenient facility for programs that want to
shield themselves from the intricacies of networking setup.
on different environment, creating bonding device is distinct.
On Fedora/Redhat, that requires modifying the files ifcfg-eth0,
ifcfg-eth1 and ifcfg-bond0 in /etc/sysconfig/network-scripts;
on Debian, it requires changing several entries in /etc/network/interfaces.

Chen Fan (2):
  qemu-agent: add guest-network-set-interface command
  qemu-agent: add guest-network-delete-interface command

 configure            |  16 +++
 qga/commands-posix.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++++++
 qga/commands-win32.c |  13 +++
 qga/qapi-schema.json |  65 +++++++++++
 4 files changed, 406 insertions(+)

-- 
1.9.3