From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vitaly E. Lavrov" Subject: [PATCH] veth: remove hardware checksum feature Date: Thu, 25 Jul 2013 21:20:16 +0400 Message-ID: <51F15E50.8080208@guap.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: davem@davemloft.net To: netdev@vger.kernel.org Return-path: Received: from mail.guap.ru ([91.151.188.3]:11647 "EHLO ns1.guap.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756228Ab3GYRnm (ORCPT ); Thu, 25 Jul 2013 13:43:42 -0400 Sender: netdev-owner@vger.kernel.org List-ID: The network device VETH can't support the feature NETIF_F_HW_CSUM. All locally generated packets have invalid checksum. Wrong commit http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8093315a91340bca52549044975d8c7f673b28a1 ( kernel 3.9.0 ) Workaround "ethtool -K vethX tx off" Possible patch: diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 177f911..3db97da 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -254,7 +254,7 @@ static const struct net_device_ops veth_netdev_ops = { }; #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ - NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \ + NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \ NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | \ NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_STAG_RX ) --