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flowcache: Make flow cache name space aware

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Inserting a entry into flowcache, or flushing flowcache should be based
on per net scope. The reason to do so is flushing operation from fat
netns crammed with flow entries will also making the slim netns with only
a few flow cache entries go away in original implementation.

Since flowcache is tightly coupled with IPsec, so it would be easier to
put flow cache global parameters into xfrm namespace part. And one last
thing needs to do is bumping flow cache genid, and flush flow cache should
also be made in per net style.

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Fan Du 2014-01-18 09:55:27 +08:00 • committed by Steffen Klassert
parent 01714109ea
commit ca925cf153
6 changed files with 103 additions and 77 deletions
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5
include/net/flow.h
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@ -218,9 +218,10 @@ struct flow_cache_object *flow_cache_lookup(struct net *net,
const struct flowi *key, u16 family,
u8 dir, flow_resolve_t resolver,
void *ctx);
int flow_cache_init(struct net *net);
void flow_cache_flush(void);
void flow_cache_flush_deferred(void);
void flow_cache_flush(struct net *net);
void flow_cache_flush_deferred(struct net *net);
extern atomic_t flow_cache_genid;
#endif