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authorDaniel Borkmann <daniel@iogearbox.net>2015-08-14 16:03:40 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2015-08-18 01:24:05 +0200
commit5e8018fc61423e677398d4ad4d72df70b9788e77 (patch)
tree5605633fddd52cf0a677ad6f62fb8bb2e7a46054 /net/ipv4
parentdeedb59039f111c41aa5a54ee384c8e7c08bc78a (diff)
downloadlinux-5e8018fc61423e677398d4ad4d72df70b9788e77.tar.bz2
netfilter: nf_conntrack: add efficient mark to zone mapping
This work adds the possibility of deriving the zone id from the skb->mark field in a scalable manner. This allows for having only a single template serving hundreds/thousands of different zones, for example, instead of the need to have one match for each zone as an extra CT jump target. Note that we'd need to have this information attached to the template as at the time when we're trying to lookup a possible ct object, we already need to know zone information for a possible match when going into __nf_conntrack_find_get(). This work provides a minimal implementation for a possible mapping. In order to not add/expose an extra ct->status bit, the zone structure has been extended to carry a flag for deriving the mark. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/netfilter/nf_conntrack_proto_icmp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 8a2f41c2fe6f..cdde3ec496e9 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -135,9 +135,10 @@ icmp_error_message(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
const struct nf_conntrack_l4proto *innerproto;
const struct nf_conntrack_tuple_hash *h;
const struct nf_conntrack_zone *zone;
+ struct nf_conntrack_zone tmp;
NF_CT_ASSERT(skb->nfct == NULL);
- zone = nf_ct_zone_tmpl(tmpl);
+ zone = nf_ct_zone_tmpl(tmpl, skb, &tmp);
/* Are they talking about one of our connections? */
if (!nf_ct_get_tuplepr(skb,