[PATCH v11 07/17] Modify netdev_alloc_page() to get external buffer

xiaohui.xin
2010-09-25T04:13:54Z

From: Xin Xiaohui <xiaohui.xin@intel.com>

Currently, it can get external buffers from mp device.

Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
Reviewed-by: Jeff Dike <jdike@linux.intel.com>

---
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;
}
--
1.7.3