From b34df5e805a6e98cae0bc5bc80c1b52d9ff811de Mon Sep 17 00:00:00 2001 From: Pravin B Shelar Date: Thu, 13 Jun 2013 11:11:44 -0700 Subject: [PATCH] openvswitch: make skb->csum consistent with rest of networking stack. Following patch keeps skb->csum correct across ovs. Signed-off-by: Pravin B Shelar Signed-off-by: Jesse Gross --- net/openvswitch/actions.c | 4 ++++ net/openvswitch/flow.c | 3 +++ net/openvswitch/vport-internal_dev.c | 1 + net/openvswitch/vport-netdev.c | 2 ++ net/openvswitch/vport.h | 7 +++++++ 5 files changed, 17 insertions(+) diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 894b6cbdd92..596d6373399 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -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; } diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index 33df0913358..fca483360ce 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -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); diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c index 84e0a037918..e284c7e1fec 100644 --- a/net/openvswitch/vport-internal_dev.c +++ b/net/openvswitch/vport-internal_dev.c @@ -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); diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c index 43712217a37..40de815b421 100644 --- a/net/openvswitch/vport-netdev.c +++ b/net/openvswitch/vport-netdev.c @@ -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; diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 1cef5cd3be4..293278c4c2d 100644 --- a/net/openvswitch/vport.h +++ b/net/openvswitch/vport.h @@ -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 */ -- 2.43.2