From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: [PATCH 1/5] virtio_net: Allow setting the MAC address of the NIC Date: Fri, 16 Jan 2009 14:13:18 -0700 Message-ID: <20090116211318.22836.87192.stgit@debian.lart> References: <20090116211312.22836.34331.stgit@debian.lart> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: rusty@rustcorp.com.au, markmc@redhat.com, kvm@vger.kernel.org To: netdev@vger.kernel.org Return-path: Received: from g1t0027.austin.hp.com ([15.216.28.34]:26793 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762905AbZAPVPK (ORCPT ); Fri, 16 Jan 2009 16:15:10 -0500 In-Reply-To: <20090116211312.22836.34331.stgit@debian.lart> Sender: netdev-owner@vger.kernel.org List-ID: Many physical NICs let the OS re-program the "hardware" MAC address. Virtual NICs should allow this too. Signed-off-by: Alex Williamson --- drivers/net/virtio_net.c | 23 +++++++++++++++++++++-- 1 files changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 43f6523..e7700de 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -561,6 +561,22 @@ stop_queue: goto done; } +static int virtnet_set_mac_address(struct net_device *dev, void *p) +{ + struct virtnet_info *vi = netdev_priv(dev); + struct virtio_device *vdev = vi->vdev; + int ret; + + ret = eth_mac_addr(dev, p); + if (ret) + return ret; + + vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), + dev->dev_addr, dev->addr_len); + + return 0; +} + #ifdef CONFIG_NET_POLL_CONTROLLER static void virtnet_netpoll(struct net_device *dev) { @@ -629,7 +645,7 @@ static const struct net_device_ops virtnet_netdev = { .ndo_stop = virtnet_close, .ndo_start_xmit = start_xmit, .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, + .ndo_set_mac_address = virtnet_set_mac_address, .ndo_change_mtu = virtnet_change_mtu, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = virtnet_netpoll, @@ -677,8 +693,11 @@ static int virtnet_probe(struct virtio_device *vdev) vdev->config->get(vdev, offsetof(struct virtio_net_config, mac), dev->dev_addr, dev->addr_len); - } else + } else { random_ether_addr(dev->dev_addr); + vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), + dev->dev_addr, dev->addr_len); + } /* Set up our device-specific information */ vi = netdev_priv(dev);