From mboxrd@z Thu Jan 1 00:00:00 1970 From: xiaohui.xin@intel.com Subject: [RFC PATCH v9 07/16] Modify netdev_alloc_page() to get external buffer Date: Fri, 6 Aug 2010 17:23:35 +0800 Message-ID: <1281086624-5765-8-git-send-email-xiaohui.xin@intel.com> References: <1281086624-5765-1-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-2-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-3-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-4-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-5-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-6-git-send-email-xiaohui.xin@intel.com> <1281086624-5765-7-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: <1281086624-5765-7-git-send-email-xiaohui.xin@intel.com> Sender: kvm-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Xin Xiaohui Currently, it can get external buffers from mp device. Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- net/core/skbuff.c | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 117d82b..1a61e2b 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -269,11 +269,38 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, } EXPORT_SYMBOL(__netdev_alloc_skb); +struct page *netdev_alloc_ext_pages(struct net_device *dev, int npages) +{ + struct mpassthru_port *port; + struct skb_ext_page *ext_page = NULL; + + port = dev->mp_port; + if (!port) + goto out; + ext_page = port->ctor(port, NULL, npages); + if (ext_page) + return ext_page->page; +out: + return NULL; + +} +EXPORT_SYMBOL(netdev_alloc_ext_pages); + +struct page *netdev_alloc_ext_page(struct net_device *dev) +{ + return netdev_alloc_ext_pages(dev, 1); + +} +EXPORT_SYMBOL(netdev_alloc_ext_page); + struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask) { int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1; struct page *page; + if (dev_is_mpassthru(dev)) + return netdev_alloc_ext_page(dev); + page = alloc_pages_node(node, gfp_mask, 0); return page; } -- 1.5.4.4