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Some vhost user backends are able to support live migration.
To provide this service the following features must be added:
1. Add the VIRTIO_NET_F_GUEST_ANNOUNCE capability to vhost-net when netdev
backend is vhost-user.
2. Provide a nop receive callback to vhost-user.
This callback is called by:
* qemu_announce_self after a migration to send fake RARP to avoid network
outage for peers talking to the migrated guest.
- For guest with GUEST_ANNOUNCE capabilities, guest already sends GARP
when the bit VIRTIO_NET_S_ANNOUNCE is set.
=> These packets must be discarded.
- For guest without GUEST_ANNOUNCE capabilities, migration termination
is notified when the guest sends packets.
=> These packets can be discarded.
* virtio_net_tx_bh with a dummy boot to send fake bootp/dhcp request.
BIOS guest manages virtio driver to send 4 bootp/dhcp request in case of
dummy boot.
=> These packets must be discarded.
Signed-off-by: Thibaut Collet <thibaut.collet@6wind.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
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| .. | ||
| checksum.c | ||
| clients.h | ||
| dump.c | ||
| eth.c | ||
| filter-buffer.c | ||
| filter.c | ||
| hub.c | ||
| hub.h | ||
| l2tpv3.c | ||
| Makefile.objs | ||
| net.c | ||
| netmap.c | ||
| queue.c | ||
| slirp.c | ||
| socket.c | ||
| tap_int.h | ||
| tap-aix.c | ||
| tap-bsd.c | ||
| tap-haiku.c | ||
| tap-linux.c | ||
| tap-linux.h | ||
| tap-solaris.c | ||
| tap-win32.c | ||
| tap.c | ||
| util.c | ||
| util.h | ||
| vde.c | ||
| vhost-user.c | ||