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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-10-07 14:22:33 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-07 14:22:33 -0700
commit654bed16cf86a9ef94495d9e6131b7ff7840a3dd (patch)
tree7d64fdb8de3e893b1acf5f420890a503a4e0327f /include/linux/skbuff.h
parentc57943a1c96214ee68f3890bb6772841ffbfd606 (diff)
downloadop-kernel-dev-654bed16cf86a9ef94495d9e6131b7ff7840a3dd.zip
op-kernel-dev-654bed16cf86a9ef94495d9e6131b7ff7840a3dd.tar.gz
net: packet split receive api
Add some packet-split receive hooks. For one this allows to do NUMA node affine page allocs. Later on these hooks will be extended to do emergency reserve allocations for fragments. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 720b688..2725f4e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -968,6 +968,9 @@ static inline void skb_fill_page_desc(struct sk_buff *skb, int i,
skb_shinfo(skb)->nr_frags = i + 1;
}
+extern void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page,
+ int off, int size);
+
#define SKB_PAGE_ASSERT(skb) BUG_ON(skb_shinfo(skb)->nr_frags)
#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_shinfo(skb)->frag_list)
#define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb))
@@ -1382,6 +1385,26 @@ static inline struct sk_buff *netdev_alloc_skb(struct net_device *dev,
return __netdev_alloc_skb(dev, length, GFP_ATOMIC);
}
+extern struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask);
+
+/**
+ * netdev_alloc_page - allocate a page for ps-rx on a specific device
+ * @dev: network device to receive on
+ *
+ * Allocate a new page node local to the specified device.
+ *
+ * %NULL is returned if there is no free memory.
+ */
+static inline struct page *netdev_alloc_page(struct net_device *dev)
+{
+ return __netdev_alloc_page(dev, GFP_ATOMIC);
+}
+
+static inline void netdev_free_page(struct net_device *dev, struct page *page)
+{
+ __free_page(page);
+}
+
/**
* skb_clone_writable - is the header of a clone writable
* @skb: buffer to check
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