tree c74392cef02c1529b00df6c5d0b8f4239fe091c3
parent 8020eb82d4c37d21dade0abeb8feed265a01819e
author Timo Teräs <timo.teras@iki.fi> 1270600204 +0000
committer David S. Miller <davem@davemloft.net> 1270636998 -0700

flow: virtualize flow cache entry methods

This allows to validate the cached object before returning it.
It also allows to destruct object properly, if the last reference
was held in flow cache. This is also a prepartion for caching
bundles in the flow cache.

In return for virtualizing the methods, we save on:
- not having to regenerate the whole flow cache on policy removal:
  each flow matching a killed policy gets refreshed as the getter
  function notices it smartly.
- we do not have to call flow_cache_flush from policy gc, since the
  flow cache now properly deletes the object if it had any references

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>