Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932871Ab0FEKHG (ORCPT ); Sat, 5 Jun 2010 06:07:06 -0400 Received: from mga01.intel.com ([192.55.52.88]:64909 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932751Ab0FEKGz (ORCPT ); Sat, 5 Jun 2010 06:06:55 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,366,1272870000"; d="scan'208";a="804988017" From: xiaohui.xin@intel.com To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, herbert@gondor.hengli.com.au, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [RFC PATCH v7 02/19] Add a new struct for device to manipulate external buffer. Date: Sat, 5 Jun 2010 18:14:41 +0800 Message-Id: <1275732899-5423-2-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 In-Reply-To: <1275732899-5423-1-git-send-email-xiaohui.xin@intel.com> References: <1275732899-5423-1-git-send-email-xiaohui.xin@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1733 Lines: 54 From: Xin Xiaohui Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- include/linux/netdevice.h | 19 ++++++++++++++++++- 1 files changed, 18 insertions(+), 1 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fa8b476..bae725c 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -530,6 +530,22 @@ 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; + struct skb_external_page *(*ctor)(struct mpassthru_port *, + struct sk_buff *, int); +}; /* * This structure defines the management hooks for network devices. @@ -952,7 +968,8 @@ 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 */ -- 1.5.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/