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Subject[PATCH v16 08/17]Modify netdev_free_page() to release external buffer
Date
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>
---
include/linux/skbuff.h | 4 +++-
net/core/skbuff.c | 24 ++++++++++++++++++++++++
2 files changed, 27 insertions(+), 1 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6e1e991..6309ce6 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1586,9 +1586,11 @@ static inline struct page *netdev_alloc_page(struct net_device *dev)
return __netdev_alloc_page(dev, GFP_ATOMIC);
}

+extern void __netdev_free_page(struct net_device *dev, struct page *page);
+
static inline void netdev_free_page(struct net_device *dev, struct page *page)
{
- __free_page(page);
+ __netdev_free_page(dev, page);
}

/**
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b9858c7..d3ece5c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -298,6 +298,30 @@ struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__netdev_alloc_page);

+void netdev_free_ext_page(struct net_device *dev, struct page *page)
+{
+ struct skb_ext_page *ext_page = NULL;
+ if (dev_is_mpassthru(dev) && dev->mp_port->hash) {
+ ext_page = dev->mp_port->hash(dev, page);
+ if (ext_page)
+ ext_page->dtor(ext_page);
+ else
+ __free_page(page);
+ }
+}
+EXPORT_SYMBOL(netdev_free_ext_page);
+
+void __netdev_free_page(struct net_device *dev, struct page *page)
+{
+ if (dev_is_mpassthru(dev)) {
+ netdev_free_ext_page(dev, page);
+ return;
+ }
+
+ __free_page(page);
+}
+EXPORT_SYMBOL(__netdev_free_page);
+
void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
int size)
{
--
1.7.3


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