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[SKBUFF]: Add skb_morph

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This patch creates a new function skb_morph that's just like skb_clone
except that it lets user provide the spare skb that will be overwritten
by the one that's to be cloned.

This will be used by IP fragment reassembly so that we get back the same
skb that went in last (rather than the head skb that we get now which
requires us to carry around double pointers all over the place).

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-10-14 00:37:52 -07:00 • committed by David S. Miller
parent dec18810c5
commit e0053ec07e
2 changed files with 54 additions and 30 deletions
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1
include/linux/skbuff.h
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@ -357,6 +357,7 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
}
extern void kfree_skbmem(struct sk_buff *skb);
extern struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
extern struct sk_buff *skb_clone(struct sk_buff *skb,
gfp_t priority);
extern struct sk_buff *skb_copy(const struct sk_buff *skb,