[IPSEC]: Add xfrm_input_state helper
This patch adds the xfrm_input_state helper function which returns the current xfrm state being processed on the input path given an sk_buff. This is currently only used by xfrm_input but will be used by ESP upon asynchronous resumption. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1317,4 +1317,9 @@ static inline void xfrm_states_delete(struct xfrm_state **states, int n)
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}
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#endif
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static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
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{
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return skb->sp->xvec[skb->sp->len - 1];
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}
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#endif /* _NET_XFRM_H */
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@ -109,7 +109,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
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/* A negative encap_type indicates async resumption. */
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if (encap_type < 0) {
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async = 1;
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x = skb->sp->xvec[skb->sp->len - 1];
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x = xfrm_input_state(skb);
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seq = XFRM_SKB_CB(skb)->seq;
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goto resume;
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}
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