nefilter: eache: reduce struct size from 32 to 24 byte
Only "cache" needs to use ulong (its used with set_bit()), missed can use
u16. Also add build-time assertion to ensure event bits fit.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 12d967b..2a10c65 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -20,11 +20,11 @@ enum nf_ct_ecache_state {
struct nf_conntrack_ecache {
unsigned long cache; /* bitops want long */
- unsigned long missed; /* missed events */
+ u16 missed; /* missed events */
u16 ctmask; /* bitmask of ct events to be delivered */
u16 expmask; /* bitmask of expect events to be delivered */
+ enum nf_ct_ecache_state state:8;/* ecache state */
u32 portid; /* netlink portid of destroyer */
- enum nf_ct_ecache_state state; /* ecache state */
};
static inline struct nf_conntrack_ecache *
diff --git a/include/uapi/linux/netfilter/nf_conntrack_common.h b/include/uapi/linux/netfilter/nf_conntrack_common.h
index b4a0a19..a8072cc 100644
--- a/include/uapi/linux/netfilter/nf_conntrack_common.h
+++ b/include/uapi/linux/netfilter/nf_conntrack_common.h
@@ -119,6 +119,9 @@ enum ip_conntrack_events {
IPCT_NATSEQADJ = IPCT_SEQADJ,
IPCT_SECMARK, /* new security mark has been set */
IPCT_LABEL, /* new connlabel has been set */
+#ifdef __KERNEL__
+ __IPCT_MAX
+#endif
};
enum ip_conntrack_expect_events {
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index 6161e92..5152129 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -420,6 +420,9 @@ int nf_conntrack_ecache_init(void)
int ret = nf_ct_extend_register(&event_extend);
if (ret < 0)
pr_err("nf_ct_event: Unable to register event extension.\n");
+
+ BUILD_BUG_ON(__IPCT_MAX >= 16); /* ctmask, missed use u16 */
+
return ret;
}