From 3e866365e1eb6bcfa2d01c21debb05b9e47a47f7 Mon Sep 17 00:00:00 2001 From: Thibaut Collet Date: Fri, 9 Oct 2015 17:17:32 +0200 Subject: vhost user: add rarp sending after live migration for legacy guest MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A new vhost user message is added to allow QEMU to ask to vhost user backend to broadcast a fake RARP after live migration for guest without GUEST_ANNOUNCE capability. This new message is sent only if the backend supports the new VHOST_USER_PROTOCOL_F_RARP protocol feature. The payload of this new message is the MAC address of the guest (not known by the backend). The MAC address is copied in the first 6 bytes of a u64 to avoid to create a new payload message type. This new message has no equivalent ioctl so a new callback is added in the userOps structure to send the request. Upon reception of this new message the vhost user backend must generate and broadcast a fake RARP request to notify the migration is terminated. Signed-off-by: Thibaut Collet [Rebased and fixed checkpatch errors - Marc-André] Signed-off-by: Marc-André Lureau Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Tested-by: Thibaut Collet --- hw/net/vhost_net.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'hw/net/vhost_net.c') diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 840f443065..d91b7b155e 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -388,6 +388,18 @@ void vhost_net_cleanup(struct vhost_net *net) g_free(net); } +int vhost_net_notify_migration_done(struct vhost_net *net, char* mac_addr) +{ + const VhostOps *vhost_ops = net->dev.vhost_ops; + int r = -1; + + if (vhost_ops->vhost_migration_done) { + r = vhost_ops->vhost_migration_done(&net->dev, mac_addr); + } + + return r; +} + bool vhost_net_virtqueue_pending(VHostNetState *net, int idx) { return vhost_virtqueue_pending(&net->dev, idx); @@ -479,6 +491,11 @@ void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev, { } +int vhost_net_notify_migration_done(struct vhost_net *net, char* mac_addr) +{ + return -1; +} + VHostNetState *get_vhost_net(NetClientState *nc) { return 0; -- cgit v1.2.3