From patchwork Fri Aug 6 09:23:29 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 117751 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o769EQYM014502 for ; Fri, 6 Aug 2010 09:14:31 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761098Ab0HFJJA (ORCPT ); Fri, 6 Aug 2010 05:09:00 -0400 Received: from mga11.intel.com ([192.55.52.93]:28117 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759360Ab0HFJI5 (ORCPT ); Fri, 6 Aug 2010 05:08:57 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 06 Aug 2010 02:06:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.55,327,1278313200"; d="scan'208";a="593547759" Received: from unknown (HELO localhost.localdomain) ([10.239.36.142]) by fmsmga002.fm.intel.com with ESMTP; 06 Aug 2010 02:07:58 -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: [RFC PATCH v9 01/16] Add a new structure for skb buffer from external. Date: Fri, 6 Aug 2010 17:23:29 +0800 Message-Id: <1281086624-5765-2-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 In-Reply-To: <1281086624-5765-1-git-send-email-xiaohui.xin@intel.com> References: <1281086624-5765-1-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 (demeter.kernel.org [140.211.167.41]); Fri, 06 Aug 2010 09:14:31 +0000 (UTC) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 124f90c..74af06c 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -203,6 +203,15 @@ struct skb_shared_info { void * destructor_arg; }; +/* 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