1 files changed, 6 insertions, 99 deletions

diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index c7b10234cf7c..4348321856af 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -434,65 +434,6 @@ static int ovs_ct_set_labels(struct nf_conn *ct, struct sw_flow_key *key,
 	return 0;
 }
 
-/* 'skb' should already be pulled to nh_ofs. */
-static int ovs_ct_helper(struct sk_buff *skb, u16 proto)
-{
-	const struct nf_conntrack_helper *helper;
-	const struct nf_conn_help *help;
-	enum ip_conntrack_info ctinfo;
-	unsigned int protoff;
-	struct nf_conn *ct;
-	int err;
-
-	ct = nf_ct_get(skb, &ctinfo);
-	if (!ct || ctinfo == IP_CT_RELATED_REPLY)
-		return NF_ACCEPT;
-
-	help = nfct_help(ct);
-	if (!help)
-		return NF_ACCEPT;
-
-	helper = rcu_dereference(help->helper);
-	if (!helper)
-		return NF_ACCEPT;
-
-	switch (proto) {
-	case NFPROTO_IPV4:
-		protoff = ip_hdrlen(skb);
-		break;
-	case NFPROTO_IPV6: {
-		u8 nexthdr = ipv6_hdr(skb)->nexthdr;
-		__be16 frag_off;
-		int ofs;
-
-		ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr,
-				       &frag_off);
-		if (ofs < 0 || (frag_off & htons(~0x7)) != 0) {
-			pr_debug("proto header not found\n");
-			return NF_ACCEPT;
-		}
-		protoff = ofs;
-		break;
-	}
-	default:
-		WARN_ONCE(1, "helper invoked on non-IP family!");
-		return NF_DROP;
-	}
-
-	err = helper->help(skb, protoff, ct, ctinfo);
-	if (err != NF_ACCEPT)
-		return err;
-
-	/* Adjust seqs after helper.  This is needed due to some helpers (e.g.,
-	 * FTP with NAT) adusting the TCP payload size when mangling IP
-	 * addresses and/or port numbers in the text-based control connection.
-	 */
-	if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) &&
-	    !nf_ct_seq_adjust(skb, ct, ctinfo, protoff))
-		return NF_DROP;
-	return NF_ACCEPT;
-}
-
 /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero
  * value if 'skb' is freed.
  */
@@ -1038,7 +979,7 @@ static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
 		 */
 		if ((nf_ct_is_confirmed(ct) ? !cached || add_helper :
 					      info->commit) &&
-		    ovs_ct_helper(skb, info->family) != NF_ACCEPT) {
+		    nf_ct_helper(skb, ct, ctinfo, info->family) != NF_ACCEPT) {
 			return -EINVAL;
 		}
 
@@ -1350,43 +1291,6 @@ int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key)
 	return 0;
 }
 
-static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name,
-			     const struct sw_flow_key *key, bool log)
-{
-	struct nf_conntrack_helper *helper;
-	struct nf_conn_help *help;
-	int ret = 0;
-
-	helper = nf_conntrack_helper_try_module_get(name, info->family,
-						    key->ip.proto);
-	if (!helper) {
-		OVS_NLERR(log, "Unknown helper \"%s\"", name);
-		return -EINVAL;
-	}
-
-	help = nf_ct_helper_ext_add(info->ct, GFP_KERNEL);
-	if (!help) {
-		nf_conntrack_helper_put(helper);
-		return -ENOMEM;
-	}
-
-#if IS_ENABLED(CONFIG_NF_NAT)
-	if (info->nat) {
-		ret = nf_nat_helper_try_module_get(name, info->family,
-						   key->ip.proto);
-		if (ret) {
-			nf_conntrack_helper_put(helper);
-			OVS_NLERR(log, "Failed to load \"%s\" NAT helper, error: %d",
-				  name, ret);
-			return ret;
-		}
-	}
-#endif
-	rcu_assign_pointer(help->helper, helper);
-	info->helper = helper;
-	return ret;
-}
-
 #if IS_ENABLED(CONFIG_NF_NAT)
 static int parse_nat(const struct nlattr *attr,
 		     struct ovs_conntrack_info *info, bool log)
@@ -1720,9 +1624,12 @@ int ovs_ct_copy_action(struct net *net, const struct nlattr *attr,
 	}
 
 	if (helper) {
-		err = ovs_ct_add_helper(&ct_info, helper, key, log);
-		if (err)
+		err = nf_ct_add_helper(ct_info.ct, helper, ct_info.family,
+				       key->ip.proto, ct_info.nat, &ct_info.helper);
+		if (err) {
+			OVS_NLERR(log, "Failed to add %s helper %d", helper, err);
 			goto err_free_ct;
+		}
 	}
 
 	err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info,