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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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include/net/flowcache.h
+25
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#ifndef _NET_FLOWCACHE_H
#define _NET_FLOWCACHE_H
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/notifier.h>
struct flow_cache_percpu {
struct hlist_head *hash_table;
int hash_count;
u32 hash_rnd;
int hash_rnd_recalc;
struct tasklet_struct flush_tasklet;
};
struct flow_cache {
u32 hash_shift;
struct flow_cache_percpu __percpu *percpu;
struct notifier_block hotcpu_notifier;
int low_watermark;
int high_watermark;
struct timer_list rnd_timer;
};
#endif /* _NET_FLOWCACHE_H */