Break out deacceleration portion of vlan_push into vlan_put
so that it may be re-used by mpls_push.
For both vlan_push and mpls_push if there is an accelerated VLAN tag
present then it should be deaccelerated, adding it to the data of
the skb, before the new tag is added.
Signed-off-by: Simon Horman <ho...@verge.net.au>
---
v2.41 - v2.47
* No change
v2.40
* As suggested by Jesse Gross
+ Simplify vlan_push by returning an error code
rather than an error code encoded as a struct xkb_buff *
v2.39
* First post
---
datapath/actions.c | 28 ++++++++++++++++++----------
1 file changed, 18 insertions(+), 10 deletions(-)
diff --git a/datapath/actions.c b/datapath/actions.c
index 30ea1d2..ee2456b 100644
--- a/datapath/actions.c
+++ b/datapath/actions.c
@@ -105,21 +105,29 @@ static int pop_vlan(struct sk_buff *skb)
return 0;
}
-static int push_vlan(struct sk_buff *skb, const struct ovs_action_push_vlan
*vlan)
+/* push down current VLAN tag */
+static int put_vlan(struct sk_buff *skb)
{
- if (unlikely(vlan_tx_tag_present(skb))) {
- u16 current_tag;
+ u16 current_tag = vlan_tx_tag_get(skb);
- /* push down current VLAN tag */
- current_tag = vlan_tx_tag_get(skb);
+ if (!__vlan_put_tag(skb, skb->vlan_proto, current_tag))
+ return -ENOMEM;
- if (!__vlan_put_tag(skb, skb->vlan_proto, current_tag))
- return -ENOMEM;
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->csum = csum_add(skb->csum, csum_partial(skb->data
+ + (2 * ETH_ALEN), VLAN_HLEN, 0));
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_add(skb->csum, csum_partial(skb->data
- + (2 * ETH_ALEN), VLAN_HLEN, 0));
+ return 0;
+}
+
+static int push_vlan(struct sk_buff *skb, const struct ovs_action_push_vlan
*vlan)
+{
+ if (unlikely(vlan_tx_tag_present(skb))) {
+ int err;
+ err = put_vlan(skb);
+ if (unlikely(err))
+ return err;
}
__vlan_hwaccel_put_tag(skb, vlan->vlan_tpid, ntohs(vlan->vlan_tci) &
~VLAN_TAG_PRESENT);
return 0;
--
1.8.4
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