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netfilter: conntrack: move event caching to conntrack extension infrastructure

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This patch reworks the per-cpu event caching to use the conntrack
extension infrastructure.

The main drawback is that we consume more memory per conntrack
if event delivery is enabled. This patch is required by the
reliable event delivery that follows to this patch.

BTW, this patch allows you to enable/disable event delivery via
/proc/sys/net/netfilter/nf_conntrack_events in runtime, although
you can still disable event caching as compilation option.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Pablo Neira Ayuso 2009-06-13 12:26:29 +02:00 • committed by Patrick McHardy
parent 65cb9fda32
commit a0891aa6a6
6 changed files with 225 additions and 165 deletions
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5
include/net/netns/conntrack.h
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@ -15,15 +15,14 @@ struct netns_ct {
struct hlist_head *expect_hash;
struct hlist_nulls_head unconfirmed;
struct ip_conntrack_stat *stat;
#ifdef CONFIG_NF_CONNTRACK_EVENTS
struct nf_conntrack_ecache *ecache;
#endif
int sysctl_events;
int sysctl_acct;
int sysctl_checksum;
unsigned int sysctl_log_invalid; /* Log invalid packets */
#ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header;
struct ctl_table_header *acct_sysctl_header;
struct ctl_table_header *event_sysctl_header;
#endif
int hash_vmalloc;
int expect_vmalloc;