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xen-platform: Cleanup network infrastructure when emulated NICs are unplugged 

When the guest unplugs the emulated NICs, cleanup the peer for each NIC
as it is not needed anymore. Most importantly, this allows the tap
interfaces which QEMU holds open to be closed and removed.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Ross Lagerwall 2017-06-30 13:50:28 +01:00 committed by Stefano Stabellini
parent 9f2130f58d
commit 6c808651e3
1 changed files with 11 additions and 0 deletions
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11
hw/i386/xen/xen_platform.c
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@ -102,8 +102,19 @@ static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
}
}
/* Remove the peer of the NIC device. Normally, this would be a tap device. */
static void del_nic_peer(NICState *nic, void *opaque)
{
NetClientState *nc;
nc = qemu_get_queue(nic);
if (nc->peer)
qemu_del_net_client(nc->peer);
}
static void pci_unplug_nics(PCIBus *bus)
{
qemu_foreach_nic(del_nic_peer, NULL);
pci_for_each_device(bus, 0, unplug_nic, NULL);
}