From mboxrd@z Thu Jan 1 00:00:00 1970 From: xiaohui.xin@intel.com Subject: [PATCH v14 06/17] Use callback to deal with skb_release_data() specially. Date: Thu, 4 Nov 2010 17:05:02 +0800 Message-ID: References: <1288861513-5707-1-git-send-email-xiaohui.xin@intel.com> Cc: Xin Xiaohui 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.apana.org.au, jdike@linux.intel.com Return-path: In-Reply-To: <1288861513-5707-1-git-send-email-xiaohui.xin@intel.com> In-Reply-To: References: Sender: kvm-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Xin Xiaohui If buffer is external, then use the callback to destruct buffers. Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- net/core/skbuff.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index c83b421..5e6d69c 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -210,6 +210,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, /* make sure we initialize shinfo sequentially */ shinfo = skb_shinfo(skb); + shinfo->destructor_arg = NULL; memset(shinfo, 0, offsetof(struct skb_shared_info, dataref)); atomic_set(&shinfo->dataref, 1); @@ -343,6 +344,13 @@ 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); } } -- 1.7.3