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net: packet split receive api

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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>
This commit is contained in:
Peter Zijlstra
2008-10-07 14:22:33 -07:00
committed by David S. Miller
parent c57943a1c9
commit 654bed16cf
2 changed files with 43 additions and 0 deletions
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20
net/core/skbuff.c
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@ -263,6 +263,26 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
return skb;
}
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;
page = alloc_pages_node(node, gfp_mask, 0);
return page;
}
EXPORT_SYMBOL(__netdev_alloc_page);
void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
int size)
{
skb_fill_page_desc(skb, i, page, off, size);
skb->len += size;
skb->data_len += size;
skb->truesize += size;
}
EXPORT_SYMBOL(skb_add_rx_frag);
/**
* dev_alloc_skb - allocate an skbuff for receiving
* @length: length to allocate