Upstream commit:
commit bc7cc5999fd392cc799630d7e375b2f4e29cc398
Author: Simon Horman <[email protected]>
openvswitch: update checksum in {push,pop}_mpls
In the case of CHECKSUM_COMPLETE the skb checksum should be updated in
{push,pop}_mpls() as they the type in the ethernet header.
As suggested by Pravin Shelar.
Cc: Pravin Shelar <[email protected]>
Fixes: 25cd9ba0abc0 ("openvswitch: Add basic MPLS support to kernel")
Signed-off-by: Simon Horman <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Pravin B Shelar <[email protected]>
---
datapath/actions.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/datapath/actions.c b/datapath/actions.c
index ed9115c..3f2ba4c 100644
--- a/datapath/actions.c
+++ b/datapath/actions.c
@@ -137,11 +137,23 @@ static bool is_flow_key_valid(const struct sw_flow_key
*key)
return !!key->eth.type;
}
+static void update_ethertype(struct sk_buff *skb, struct ethhdr *hdr,
+ __be16 ethertype)
+{
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ __be16 diff[] = { ~(hdr->h_proto), ethertype };
+
+ skb->csum = ~csum_partial((char *)diff, sizeof(diff),
+ ~skb->csum);
+ }
+
+ hdr->h_proto = ethertype;
+}
+
static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_mpls *mpls)
{
__be32 *new_mpls_lse;
- struct ethhdr *hdr;
/* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */
if (skb->encapsulation)
@@ -160,8 +172,7 @@ static int push_mpls(struct sk_buff *skb, struct
sw_flow_key *key,
skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN);
- hdr = eth_hdr(skb);
- hdr->h_proto = mpls->mpls_ethertype;
+ update_ethertype(skb, eth_hdr(skb), mpls->mpls_ethertype);
if (!ovs_skb_get_inner_protocol(skb))
ovs_skb_set_inner_protocol(skb, skb->protocol);
skb->protocol = mpls->mpls_ethertype;
@@ -192,7 +203,7 @@ static int pop_mpls(struct sk_buff *skb, struct sw_flow_key
*key,
* field correctly in the presence of VLAN tags.
*/
hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN);
- hdr->h_proto = ethertype;
+ update_ethertype(skb, hdr, ethertype);
if (eth_p_mpls(skb->protocol))
skb->protocol = ethertype;
--
1.9.1
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