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netfilter: conntrack: spinlock per cpu to protect special lists.

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One spinlock per cpu to protect dying/unconfirmed/template special lists.
(These lists are now per cpu, a bit like the untracked ct)
Add a @cpu field to nf_conn, to make sure we hold the appropriate
spinlock at removal time.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jesper Dangaard Brouer
2014-03-03 14:45:20 +01:00
committed by Pablo Neira Ayuso
parent b476b72a0f
commit b7779d06f9
5 changed files with 168 additions and 79 deletions
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11
include/net/netns/conntrack.h
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@@ -62,6 +62,13 @@ struct nf_ip_net {
#endif
};
struct ct_pcpu {
spinlock_t lock;
struct hlist_nulls_head unconfirmed;
struct hlist_nulls_head dying;
struct hlist_nulls_head tmpl;
};
struct netns_ct {
atomic_t count;
unsigned int expect_count;
@@ -86,9 +93,7 @@ struct netns_ct {
struct kmem_cache *nf_conntrack_cachep;
struct hlist_nulls_head *hash;
struct hlist_head *expect_hash;
struct hlist_nulls_head unconfirmed;
struct hlist_nulls_head dying;
struct hlist_nulls_head tmpl;
struct ct_pcpu __percpu *pcpu_lists;
struct ip_conntrack_stat __percpu *stat;
struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
struct nf_exp_event_notifier __rcu *nf_expect_event_cb;