static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_vlan *vlan)
{
if (skb_vlan_tag_present(skb))
invalidate_flow_key(key);
else
key->eth.tci = vlan->vlan_tci;
return skb_vlan_push(skb, vlan->vlan_tpid,
ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
}
static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
struct tcf_vlan *v = a->priv;
int action;
int err;
spin_lock(&v->tcf_lock);
v->tcf_tm.lastuse = jiffies;
bstats_update(&v->tcf_bstats, skb);
action = v->tcf_action;
switch (v->tcfv_action) {
case TCA_VLAN_ACT_POP:
err = skb_vlan_pop(skb);
if (err)
goto drop;
break;
case TCA_VLAN_ACT_PUSH:
err = skb_vlan_push(skb, v->tcfv_push_proto, v->tcfv_push_vid);
if (err)
goto drop;
break;
default:
BUG();
}
goto unlock;
drop:
action = TC_ACT_SHOT;
v->tcf_qstats.drops++;
unlock:
spin_unlock(&v->tcf_lock);
return action;
}
