Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932795Ab0FEKGz (ORCPT ); Sat, 5 Jun 2010 06:06:55 -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 S932711Ab0FEKGx (ORCPT ); Sat, 5 Jun 2010 06:06:53 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,366,1272870000"; d="scan'208";a="804988009" 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 01/19] Add a new structure for skb buffer from external. Date: Sat, 5 Jun 2010 18:14:40 +0800 Message-Id: <1275732899-5423-1-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1450 Lines: 40 From: Xin Xiaohui Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- include/linux/skbuff.h | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 124f90c..cf309c9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -203,6 +203,18 @@ struct skb_shared_info { void * destructor_arg; }; +/* The structure is for a skb which skb->data may point to + * an external buffer, which is not allocated from kernel space. + * Since the buffer is external, then the shinfo or frags are + * also extern too. It also contains a destructor for itself. + */ +struct skb_external_page { + u8 *start; + int size; + struct skb_frag_struct *frags; + struct skb_shared_info *ushinfo; + void (*dtor)(struct skb_external_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 -- 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/