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Next commit will introduce live-migration (with fd-passing) for TAP net backend. So, now we prepare virtio-net for it Add virtio-net option local-migration, which is true by default, but false for older machine types, which doesn't support the feature. We introduce interface for live-migrating backends: 1. ->is_wait_incoming() handler, so that virtio-net knows, that backend is not fully intialized, as it waits for incoming migration stream. 2. MIG_PRI_BACKEND priority: backends should migrate with higher priority than virtio-net, so that we can do final preparations here in post-load handlers and be sure, that backends are already prepared. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Reviewed-by: Ben Chaney <bchaney@akamai.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Message-ID: <20260819180201.1970193-14-vsementsov@yandex-team.ru>