[PATCH net-next 1/3] net: vrf: Minor refactoring for local address patches
From: David Ahern <hidden>
Date: 2016-06-02 20:16:42
Subsystem:
networking drivers, the rest, vrf · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, David Ahern
Move the stripping of the ethernet header from is_ip_tx_frame into the ipv4 and ipv6 outbound functions. If the packet is destined to a local address the header is retained since the packet is sent back to netif_rx. Collapse vrf_send_v4_prep into vrf_process_v4_outbound. Signed-off-by: David Ahern <redacted> --- drivers/net/vrf.c | 45 ++++++++++++++++++--------------------------- 1 file changed, 18 insertions(+), 27 deletions(-)
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index aaac4c779047..d678aaeba572 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c@@ -125,6 +125,9 @@ static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, skb_dst_drop(skb); skb_dst_set(skb, dst); + /* strip the ethernet header added for pass through VRF device */ + __skb_pull(skb, skb_network_offset(skb)); + ret = ip6_local_out(net, skb->sk, skb); if (unlikely(net_xmit_eval(ret))) dev->stats.tx_errors++;
@@ -145,29 +148,6 @@ static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, } #endif -static int vrf_send_v4_prep(struct sk_buff *skb, struct flowi4 *fl4, - struct net_device *vrf_dev) -{ - struct rtable *rt; - int err = 1; - - rt = ip_route_output_flow(dev_net(vrf_dev), fl4, NULL); - if (IS_ERR(rt)) - goto out; - - /* TO-DO: what about broadcast ? */ - if (rt->rt_type != RTN_UNICAST && rt->rt_type != RTN_LOCAL) { - ip_rt_put(rt); - goto out; - } - - skb_dst_drop(skb); - skb_dst_set(skb, &rt->dst); - err = 0; -out: - return err; -} - static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, struct net_device *vrf_dev) {
@@ -182,10 +162,24 @@ static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, FLOWI_FLAG_SKIP_NH_OIF, .daddr = ip4h->daddr, }; + struct net *net = dev_net(vrf_dev); + struct rtable *rt; - if (vrf_send_v4_prep(skb, &fl4, vrf_dev)) + rt = ip_route_output_flow(net, &fl4, NULL); + if (IS_ERR(rt)) goto err; + if (rt->rt_type != RTN_UNICAST && rt->rt_type != RTN_LOCAL) { + ip_rt_put(rt); + goto err; + } + + skb_dst_drop(skb); + skb_dst_set(skb, &rt->dst); + + /* strip the ethernet header added for pass through VRF device */ + __skb_pull(skb, skb_network_offset(skb)); + if (!ip4h->saddr) { ip4h->saddr = inet_select_addr(skb_dst(skb)->dev, 0, RT_SCOPE_LINK);
@@ -206,9 +200,6 @@ static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, static netdev_tx_t is_ip_tx_frame(struct sk_buff *skb, struct net_device *dev) { - /* strip the ethernet header added for pass through VRF device */ - __skb_pull(skb, skb_network_offset(skb)); - switch (skb->protocol) { case htons(ETH_P_IP): return vrf_process_v4_outbound(skb, dev);
--
2.1.4