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net: vrf: Minor refactoring for local address patches 

Move the stripping of the ethernet header from is_ip_tx_frame into the
ipv4 and ipv6 outbound functions and collapse vrf_send_v4_prep into
vrf_process_v4_outbound.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2016-06-06 20:50:38 -07:00 committed by David S. Miller
parent c1e48af796
commit 911a66fbc8
1 changed files with 18 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/net/vrf.c
View File

@ -119,6 +119,9 @@ static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb,
skb_dst_drop(skb); skb_dst_drop(skb);
skb_dst_set(skb, dst); 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); ret = ip6_local_out(net, skb->sk, skb);
if (unlikely(net_xmit_eval(ret))) if (unlikely(net_xmit_eval(ret)))
dev->stats.tx_errors++; dev->stats.tx_errors++;
@ -139,29 +142,6 @@ static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb,
} }
#endif #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, static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb,
struct net_device *vrf_dev) struct net_device *vrf_dev)
{ {
@ -176,10 +156,24 @@ static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb,
FLOWI_FLAG_SKIP_NH_OIF, FLOWI_FLAG_SKIP_NH_OIF,
.daddr = ip4h->daddr, .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; 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) { if (!ip4h->saddr) {
ip4h->saddr = inet_select_addr(skb_dst(skb)->dev, 0, ip4h->saddr = inet_select_addr(skb_dst(skb)->dev, 0,
RT_SCOPE_LINK); RT_SCOPE_LINK);
@ -200,9 +194,6 @@ err:
static netdev_tx_t is_ip_tx_frame(struct sk_buff *skb, struct net_device *dev) 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) { switch (skb->protocol) {
case htons(ETH_P_IP): case htons(ETH_P_IP):
return vrf_process_v4_outbound(skb, dev); return vrf_process_v4_outbound(skb, dev);