static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
const struct ovs_conntrack_info *info,
struct sk_buff *skb)
{
/* If we are recirculating packets to match on conntrack fields and
* committing with a separate conntrack action, then we don't need to
* actually run the packet through conntrack twice unless it's for a
* different zone.
*/
if (!skb_nfct_cached(net, skb, info)) {
struct nf_conn *tmpl = info->ct;
/* Associate skb with specified zone. */
if (tmpl) {
if (skb->nfct)
nf_conntrack_put(skb->nfct);
nf_conntrack_get(&tmpl->ct_general);
skb->nfct = &tmpl->ct_general;
skb->nfctinfo = IP_CT_NEW;
}
if (nf_conntrack_in(net, info->family, NF_INET_FORWARD,
skb) != NF_ACCEPT)
return -ENOENT;
if (ovs_ct_helper(skb, info->family) != NF_ACCEPT) {
WARN_ONCE(1, "helper rejected packet");
return -EINVAL;
}
}
ovs_ct_update_key(skb, info, key, true);
return 0;
}
/* Lookup connection and confirm if unconfirmed. */
static int ovs_ct_commit(struct net *net, struct sw_flow_key *key,
const struct ovs_conntrack_info *info,
struct sk_buff *skb)
{
u8 state;
int err;
state = key->ct.state;
if (key->ct.zone == info->zone.id &&
((state & OVS_CS_F_TRACKED) && !(state & OVS_CS_F_NEW))) {
/* Previous lookup has shown that this connection is already
* tracked and committed. Skip committing.
*/
return 0;
}
err = __ovs_ct_lookup(net, key, info, skb);
if (err)
return err;
if (nf_conntrack_confirm(skb) != NF_ACCEPT)
return -EINVAL;
ovs_ct_update_key(skb, key, true);
return 0;
}
/* Lookup connection and read fields into key. */
static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
const struct ovs_conntrack_info *info,
struct sk_buff *skb)
{
struct nf_conntrack_expect *exp;
exp = ovs_ct_expect_find(net, &info->zone, info->family, skb);
if (exp) {
u8 state;
state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED;
__ovs_ct_update_key(key, state, &info->zone, exp->master);
} else {
int err;
err = __ovs_ct_lookup(net, key, info, skb);
if (err)
return err;
ovs_ct_update_key(skb, key, true);
}
return 0;
}
void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key)
{
ovs_ct_update_key(skb, NULL, key, false);
}
