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linux-sg2042
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openvswitch: make skb->csum consistent with rest of networking stack. 

Following patch keeps skb->csum correct across ovs.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar 2013-06-13 11:11:44 -07:00 committed by Jesse Gross
parent 45bfa52e36
commit b34df5e805
5 changed files with 17 additions and 0 deletions
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4
net/openvswitch/actions.c
View File

@ -130,9 +130,13 @@ static int set_eth_addr(struct sk_buff *skb,
if (unlikely(err))
return err;
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
memcpy(eth_hdr(skb)->h_source, eth_key->eth_src, ETH_ALEN);
memcpy(eth_hdr(skb)->h_dest, eth_key->eth_dst, ETH_ALEN);
ovs_skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
return 0;
}

3
net/openvswitch/flow.c
View File

@ -618,6 +618,9 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
__skb_pull(skb, 2 * ETH_ALEN);
/* We are going to push all headers that we pull, so no need to
* update skb->csum here.
*/
if (vlan_tx_tag_present(skb))
key->eth.tci = htons(skb->vlan_tci);

1
net/openvswitch/vport-internal_dev.c
View File

@ -221,6 +221,7 @@ static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
skb->dev = netdev;
skb->pkt_type = PACKET_HOST;
skb->protocol = eth_type_trans(skb, netdev);
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
netif_rx(skb);

2
net/openvswitch/vport-netdev.c
View File

@ -49,6 +49,8 @@ static void netdev_port_receive(struct vport *vport, struct sk_buff *skb)
return;
skb_push(skb, ETH_HLEN);
ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
ovs_vport_receive(vport, skb);
return;

7
net/openvswitch/vport.h
View File

@ -192,4 +192,11 @@ void ovs_vport_record_error(struct vport *, enum vport_err_type err_type);
extern const struct vport_ops ovs_netdev_vport_ops;
extern const struct vport_ops ovs_internal_vport_ops;
static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
const void *start, unsigned int len)
{
if (skb->ip_summed == CHECKSUM_COMPLETE)
skb->csum = csum_add(skb->csum, csum_partial(start, len, 0));
}
#endif /* vport.h */