From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756200Ab0IYEPE (ORCPT ); Sat, 25 Sep 2010 00:15:04 -0400 Received: from mga02.intel.com ([134.134.136.20]:29442 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751097Ab0IYEKo (ORCPT ); Sat, 25 Sep 2010 00:10:44 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.57,233,1283756400"; d="scan'208";a="557826760" From: xiaohui.xin@intel.com To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, davem@davemloft.net, herbert@gondor.hengli.com.au, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [PATCH v11 02/17] Add a new struct for device to manipulate external buffer. Date: Sat, 25 Sep 2010 12:27:20 +0800 Message-Id: X-Mailer: git-send-email 1.7.3 In-Reply-To: <1285388855-27410-1-git-send-email-xiaohui.xin@intel.com> References: <1285388855-27410-1-git-send-email-xiaohui.xin@intel.com> In-Reply-To: <59d8a50047ee01e26658fd676d26c0162b79e5fd.1285385607.git.xiaohui.xin@intel.com> References: <59d8a50047ee01e26658fd676d26c0162b79e5fd.1285385607.git.xiaohui.xin@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xin Xiaohui Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- include/linux/netdevice.h | 22 +++++++++++++++++++++- 1 files changed, 21 insertions(+), 1 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fa8b476..ba582e1 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -530,6 +530,25 @@ struct netdev_queue { unsigned long tx_dropped; } ____cacheline_aligned_in_smp; +/* Add a structure in structure net_device, the new field is + * named as mp_port. It's for mediate passthru (zero-copy). + * It contains the capability for the net device driver, + * a socket, and an external buffer creator, external means + * skb buffer belongs to the device may not be allocated from + * kernel space. + */ +struct mpassthru_port { + int hdr_len; + int data_len; + int npages; + unsigned flags; + struct socket *sock; + int vnet_hlen; + struct skb_ext_page *(*ctor)(struct mpassthru_port *, + struct sk_buff *, int); + struct skb_ext_page *(*hash)(struct net_device *, + struct page *); +}; /* * This structure defines the management hooks for network devices. @@ -952,7 +971,8 @@ struct net_device { struct macvlan_port *macvlan_port; /* GARP */ struct garp_port *garp_port; - + /* mpassthru */ + struct mpassthru_port *mp_port; /* class/net/name entry */ struct device dev; /* space for optional device, statistics, and wireless sysfs groups */ -- 1.7.3