search for: virtnet_bypass_destroy

...er(vi->bypass_netdev, bypass_netdev); >> + >> + return 0; >> + >> +err_bypass: >> + unregister_netdev(bypass_netdev); >> +err_register_netdev: >> + free_netdev(bypass_netdev); >> + >> + return res; >> +} >> + >> +static void virtnet_bypass_destroy(struct virtnet_info *vi) >> +{ >> + struct net_device *bypass_netdev; >> + struct virtnet_bypass_info *vbi; >> + struct net_device *child_netdev; >> + >> + bypass_netdev = rcu_dereference(vi->bypass_netdev); >> + /* no device found, nothing to free */ &g...

...< 0) >+ goto err_bypass; >+ >+ rcu_assign_pointer(vi->bypass_netdev, bypass_netdev); >+ >+ return 0; >+ >+err_bypass: >+ unregister_netdev(bypass_netdev); >+err_register_netdev: >+ free_netdev(bypass_netdev); >+ >+ return res; >+} >+ >+static void virtnet_bypass_destroy(struct virtnet_info *vi) >+{ >+ struct net_device *bypass_netdev; >+ struct virtnet_bypass_info *vbi; >+ struct net_device *child_netdev; >+ >+ bypass_netdev = rcu_dereference(vi->bypass_netdev); >+ /* no device found, nothing to free */ >+ if (!bypass_netdev) >+ retu...

...< 0) >+ goto err_bypass; >+ >+ rcu_assign_pointer(vi->bypass_netdev, bypass_netdev); >+ >+ return 0; >+ >+err_bypass: >+ unregister_netdev(bypass_netdev); >+err_register_netdev: >+ free_netdev(bypass_netdev); >+ >+ return res; >+} >+ >+static void virtnet_bypass_destroy(struct virtnet_info *vi) >+{ >+ struct net_device *bypass_netdev; >+ struct virtnet_bypass_info *vbi; >+ struct net_device *child_netdev; >+ >+ bypass_netdev = rcu_dereference(vi->bypass_netdev); >+ /* no device found, nothing to free */ >+ if (!bypass_netdev) >+ retu...

..._off(bypass_netdev); + + vi->bypass_netdev = bypass_netdev; + + /* Change the name of the backup interface to vbkup0 + * we may need to revisit naming later but this gets it out + * of the way for now. + */ + strcpy(backup_netdev->name, "vbkup%d"); + + return 0; +} + +static void virtnet_bypass_destroy(struct virtnet_info *vi) +{ + struct net_device *bypass_netdev = vi->bypass_netdev; + struct virtnet_bypass_info *vbi; + struct net_device *child_netdev; + + /* no device found, nothing to free */ + if (!bypass_netdev) + return; + + vbi = netdev_priv(bypass_netdev); + + netif_device_detach(bypa...

...register_instance(virtnet_bypass, bypass_netdev); + if (res < 0) + goto err_bypass; + + rcu_assign_pointer(vi->bypass_netdev, bypass_netdev); + + return 0; + +err_bypass: + unregister_netdev(bypass_netdev); +err_register_netdev: + free_netdev(bypass_netdev); + + return res; +} + +static void virtnet_bypass_destroy(struct virtnet_info *vi) +{ + struct net_device *bypass_netdev; + struct virtnet_bypass_info *vbi; + struct net_device *child_netdev; + + bypass_netdev = rcu_dereference(vi->bypass_netdev); + /* no device found, nothing to free */ + if (!bypass_netdev) + return; + + vbi = netdev_priv(bypass_net...

The main motivation for this patch is to enable cloud service providers to provide an accelerated datapath to virtio-net enabled VMs in a transparent manner with no/minimal guest userspace changes. This also enables hypervisor controlled live migration to be supported with VMs that have direct attached SR-IOV VF devices. Patch 1 introduces a new feature bit VIRTIO_NET_F_BACKUP that can be used

Patch 1 introduces a new feature bit VIRTIO_NET_F_BACKUP that can be used by hypervisor to indicate that virtio_net interface should act as a backup for another device with the same MAC address. Ppatch 2 is in response to the community request for a 3 netdev solution. However, it creates some issues we'll get into in a moment. It extends virtio_net to use alternate datapath when available

Patch 1 introduces a new feature bit VIRTIO_NET_F_BACKUP that can be used by hypervisor to indicate that virtio_net interface should act as a backup for another device with the same MAC address. Ppatch 2 is in response to the community request for a 3 netdev solution. However, it creates some issues we'll get into in a moment. It extends virtio_net to use alternate datapath when available