From patchwork Fri Oct 15 09:12:02 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 255791 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id o9F8w5wD005125 for ; Fri, 15 Oct 2010 08:58:06 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755317Ab0JOI5e (ORCPT ); Fri, 15 Oct 2010 04:57:34 -0400 Received: from mga01.intel.com ([192.55.52.88]:49841 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753151Ab0JOIwx (ORCPT ); Fri, 15 Oct 2010 04:52:53 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 15 Oct 2010 01:52:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.57,335,1283756400"; d="scan'208";a="616995369" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.36.73]) by fmsmga002.fm.intel.com with ESMTP; 15 Oct 2010 01:52:44 -0700 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: [PATCH v13 01/16] Add a new structure for skb buffer from external. Date: Fri, 15 Oct 2010 17:12:02 +0800 Message-Id: X-Mailer: git-send-email 1.7.3 In-Reply-To: <1287133937-5538-1-git-send-email-xiaohui.xin@intel.com> References: <1287133937-5538-1-git-send-email-xiaohui.xin@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Fri, 15 Oct 2010 08:58:06 +0000 (UTC) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 77eb60d..696e690 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -211,6 +211,15 @@ struct skb_shared_info { skb_frag_t frags[MAX_SKB_FRAGS]; }; +/* The structure is for a skb which pages may point to + * an external buffer, which is not allocated from kernel space. + * It also contains a destructor for itself. + */ +struct skb_ext_page { + struct page *page; + void (*dtor)(struct skb_ext_page *); +}; + /* We divide dataref into two halves. The higher 16 bits hold references * to the payload part of skb->data. The lower 16 bits hold references to * the entire skb->data. A clone of a headerless skb holds the length of