xfrm: policy: store inexact policies in a tree ordered by destination address
This adds inexact lists per destination network, stored in a search tree. Inexact lookups now return two 'candidate lists', the 'any' policies ('any' destionations), and a list of policies that share same daddr/prefix. Next patch will add a second search tree for 'saddr:any' policies so we can avoid placing those on the 'any:any' list too. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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