tunnel: use iptunnel_xmit() again

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>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index f057ec0..f3a135c 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -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:

diff --git a/include/net/ipip.h b/include/net/ipip.h
index fd19625..0c046e3 100644 (file)
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -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)) {

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index d0ef0e6..a13a097 100644 (file)
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -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)

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index b50435b..34e006f 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -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;
 

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 02f96dc..898e671 100644 (file)
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -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;