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Make netdev_del delete the netdev even when it's in use 

To hot-unplug guest and host part of a network device, you do:

    device_del NIC-ID
    netdev_del NETDEV-ID

For PCI devices, device_del merely tells ACPI to unplug the device.
The device goes away for real only after the guest processed the ACPI
unplug event.

You have to wait until then (e.g. by polling info pci) before you can
unplug the netdev.  Not good.

Fix by removing the "in use" check from do_netdev_del().  Deleting a
netdev while it's in use is safe; packets simply get routed to the bit
bucket.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Markus Armbruster 2010-06-11 14:21:34 +02:00 committed by Anthony Liguori
parent 40ac17cd56
commit 2ffcb18de0
1 changed files with 0 additions and 4 deletions
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net.c
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@ -1221,10 +1221,6 @@ int do_netdev_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
qerror_report(QERR_DEVICE_NOT_FOUND, id);
return -1;
}
if (vc->peer) {
qerror_report(QERR_DEVICE_IN_USE, id);
return -1;
}
qemu_del_vlan_client(vc);
qemu_opts_del(qemu_opts_find(&qemu_netdev_opts, id));
return 0;