From patchwork Thu Jul 29 11:14:38 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 115091 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 o6TB5QqT015243 for ; Thu, 29 Jul 2010 11:05:59 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756965Ab0G2LBf (ORCPT ); Thu, 29 Jul 2010 07:01:35 -0400 Received: from mga11.intel.com ([192.55.52.93]:58755 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756907Ab0G2LBZ (ORCPT ); Thu, 29 Jul 2010 07:01:25 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 29 Jul 2010 03:59:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.55,279,1278313200"; d="scan'208";a="590877540" Received: from unknown (HELO localhost.localdomain) ([10.239.36.142]) by fmsmga002.fm.intel.com with ESMTP; 29 Jul 2010 04:00:35 -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 v8 06/16] Use callback to deal with skb_release_data() specially. Date: Thu, 29 Jul 2010 19:14:38 +0800 Message-Id: <1280402088-5849-7-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 In-Reply-To: <1280402088-5849-6-git-send-email-xiaohui.xin@intel.com> References: <1280402088-5849-1-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-2-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-3-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-4-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-5-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-6-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]); Thu, 29 Jul 2010 11:06:00 +0000 (UTC) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 74af06c..ab29675 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -197,10 +197,11 @@ struct skb_shared_info { union skb_shared_tx tx_flags; struct sk_buff *frag_list; struct skb_shared_hwtstamps hwtstamps; - skb_frag_t frags[MAX_SKB_FRAGS]; /* Intermediate layers must ensure that destructor_arg * remains valid until skb destructor */ void * destructor_arg; + + skb_frag_t frags[MAX_SKB_FRAGS]; }; /* The structure is for a skb which pages may point to diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 93c4e06..117d82b 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -217,6 +217,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, shinfo->gso_type = 0; shinfo->ip6_frag_id = 0; shinfo->tx_flags.flags = 0; + shinfo->destructor_arg = NULL; skb_frag_list_init(skb); memset(&shinfo->hwtstamps, 0, sizeof(shinfo->hwtstamps)); @@ -350,6 +351,13 @@ static void skb_release_data(struct sk_buff *skb) if (skb_has_frags(skb)) skb_drop_fraglist(skb); + if (skb->dev && dev_is_mpassthru(skb->dev)) { + struct skb_ext_page *ext_page = + skb_shinfo(skb)->destructor_arg; + if (ext_page && ext_page->dtor) + ext_page->dtor(ext_page); + } + kfree(skb->head); } }