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tunnel: use iptunnel_xmit() again

Browse Source 
With recent patches from Pravin, most tunnels can't use iptunnel_xmit()
any more, due to ip_select_ident() and skb->ip_summed. But we can just
move these operations out of iptunnel_xmit(), so that tunnels can
use it again.

This by the way fixes a bug in vxlan (missing nf_reset()) for net-next.

Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2013-03-09 16:38:39 +00:00 committed by David S. Miller
parent 4f3ed9209f
commit 6aed0c8bf7
5 changed files with 5 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/vxlan.c
View File

@ -855,7 +855,6 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
__u16 src_port;
__be16 df = 0;
__u8 tos, ttl;
int err;
bool did_rsc = false;
const struct vxlan_fdb *f;
@ -980,18 +979,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
if (handle_offloads(skb))
goto drop;
err = ip_local_out(skb);
if (likely(net_xmit_eval(err) == 0)) {
struct vxlan_stats *stats = this_cpu_ptr(vxlan->stats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += pkt_len;
u64_stats_update_end(&stats->syncp);
} else {
dev->stats.tx_errors++;
dev->stats.tx_aborted_errors++;
}
iptunnel_xmit(skb, dev);
return NETDEV_TX_OK;
drop:

3
include/net/ipip.h
View File

@ -51,13 +51,10 @@ struct ip_tunnel_prl_entry {
static inline void iptunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
int err;
struct iphdr *iph = ip_hdr(skb);
int pkt_len = skb->len - skb_transport_offset(skb);
struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
nf_reset(skb);
skb->ip_summed = CHECKSUM_NONE;
ip_select_ident(iph, skb_dst(skb), NULL);
err = ip_local_out(skb);
if (likely(net_xmit_eval(err) == 0)) {

16
net/ipv4/ip_gre.c
View File

@ -762,7 +762,6 @@ error:
static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *old_iph;
const struct iphdr *tiph;
@ -778,7 +777,6 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
int mtu;
u8 ttl;
int err;
int pkt_len;
skb = handle_offloads(tunnel, skb);
if (IS_ERR(skb)) {
@ -1022,19 +1020,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
}
}
nf_reset(skb);
pkt_len = skb->len - skb_transport_offset(skb);
err = ip_local_out(skb);
if (likely(net_xmit_eval(err) == 0)) {
u64_stats_update_begin(&tstats->syncp);
tstats->tx_bytes += pkt_len;
tstats->tx_packets++;
u64_stats_update_end(&tstats->syncp);
} else {
dev->stats.tx_errors++;
dev->stats.tx_aborted_errors++;
}
iptunnel_xmit(skb, dev);
return NETDEV_TX_OK;
#if IS_ENABLED(CONFIG_IPV6)

18
net/ipv4/ipip.c
View File

@ -478,8 +478,6 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
__be32 dst = tiph->daddr;
struct flowi4 fl4;
int mtu;
int err;
int pkt_len;
if (skb->protocol != htons(ETH_P_IP))
goto tx_error;
@ -600,21 +598,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
if ((iph->ttl = tiph->ttl) == 0)
iph->ttl = old_iph->ttl;
nf_reset(skb);
pkt_len = skb->len - skb_transport_offset(skb);
err = ip_local_out(skb);
if (likely(net_xmit_eval(err) == 0)) {
struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp);
tstats->tx_bytes += pkt_len;
tstats->tx_packets++;
u64_stats_update_end(&tstats->syncp);
} else {
dev->stats.tx_errors++;
dev->stats.tx_aborted_errors++;
}
iptunnel_xmit(skb, dev);
return NETDEV_TX_OK;

2
net/ipv6/sit.c
View File

@ -899,6 +899,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
if ((iph->ttl = tiph->ttl) == 0)
iph->ttl = iph6->hop_limit;
skb->ip_summed = CHECKSUM_NONE;
ip_select_ident(iph, skb_dst(skb), NULL);
iptunnel_xmit(skb, dev);
return NETDEV_TX_OK;