net: convert __IPTUNNEL_XMIT() to an inline function

__IPTUNNEL_XMIT() is an ugly macro, convert it to a static
inline function, so make it more readable.

IPTUNNEL_XMIT() is unused, just remove it.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 8aca888..9814d67 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -769,7 +769,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 
        vxlan_set_owner(dev, skb);
 
-       /* See __IPTUNNEL_XMIT */
+       /* See iptunnel_xmit() */
        skb->ip_summed = CHECKSUM_NONE;
        ip_select_ident(iph, &rt->dst, NULL);
 

diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index 1cc595a..06d1d5b 100644 (file)
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -4,5 +4,15 @@
 #include <linux/ip.h>
 #include <linux/in6.h>
 #include <uapi/linux/if_tunnel.h>
+#include <linux/u64_stats_sync.h>
+
+/* often modified stats are per cpu, other are shared (netdev->stats) */
+struct pcpu_tstats {
+       u64     rx_packets;
+       u64     rx_bytes;
+       u64     tx_packets;
+       u64     tx_bytes;
+       struct u64_stats_sync   syncp;
+};
 
 #endif /* _IF_TUNNEL_H_ */

diff --git a/include/net/ipip.h b/include/net/ipip.h
index ddc077c..21947cf 100644 (file)
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -48,25 +48,27 @@ struct ip_tunnel_prl_entry {
        struct rcu_head                 rcu_head;
 };
 
-#define __IPTUNNEL_XMIT(stats1, stats2) do {                           \
-       int err;                                                        \
-       int pkt_len = skb->len - skb_transport_offset(skb);             \
-                                                                       \
-       skb->ip_summed = CHECKSUM_NONE;                                 \
-       ip_select_ident(iph, &rt->dst, NULL);                           \
-                                                                       \
-       err = ip_local_out(skb);                                        \
-       if (likely(net_xmit_eval(err) == 0)) {                          \
-               u64_stats_update_begin(&(stats1)->syncp);               \
-               (stats1)->tx_bytes += pkt_len;                          \
-               (stats1)->tx_packets++;                                 \
-               u64_stats_update_end(&(stats1)->syncp);                 \
-       } else {                                                        \
-               (stats2)->tx_errors++;                                  \
-               (stats2)->tx_aborted_errors++;                          \
-       }                                                               \
-} while (0)
+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);
 
-#define IPTUNNEL_XMIT() __IPTUNNEL_XMIT(txq, stats)
+       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)) {
+               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++;
+       }
+}
 
 #endif

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 7240f8e..37000ae 100644 (file)
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -171,15 +171,6 @@ struct ipgre_net {
 #define for_each_ip_tunnel_rcu(start) \
        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       u64     rx_packets;
-       u64     rx_bytes;
-       u64     tx_packets;
-       u64     tx_bytes;
-       struct u64_stats_sync   syncp;
-};
-
 static struct rtnl_link_stats64 *ipgre_get_stats64(struct net_device *dev,
                                                   struct rtnl_link_stats64 *tot)
 {
@@ -753,7 +744,6 @@ drop:
 static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct ip_tunnel *tunnel = netdev_priv(dev);
-       struct pcpu_tstats *tstats;
        const struct iphdr  *old_iph = ip_hdr(skb);
        const struct iphdr  *tiph;
        struct flowi4 fl4;
@@ -977,9 +967,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
                }
        }
 
-       nf_reset(skb);
-       tstats = this_cpu_ptr(dev->tstats);
-       __IPTUNNEL_XMIT(tstats, &dev->stats);
+       iptunnel_xmit(skb, dev);
        return NETDEV_TX_OK;
 
 #if IS_ENABLED(CONFIG_IPV6)

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 1831092..e0f2c88 100644 (file)
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -71,15 +71,6 @@ static int vti_tunnel_bind_dev(struct net_device *dev);
 #define for_each_ip_tunnel_rcu(start) \
        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       u64     rx_packets;
-       u64     rx_bytes;
-       u64     tx_packets;
-       u64     tx_bytes;
-       struct  u64_stats_sync  syncp;
-};
-
 #define VTI_XMIT(stats1, stats2) do {                          \
        int err;                                                \
        int pkt_len = skb->len;                                 \

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 720855e..3a4ad7d 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -147,15 +147,6 @@ static struct rtnl_link_ops ipip_link_ops __read_mostly;
 #define for_each_ip_tunnel_rcu(start) \
        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       u64     rx_packets;
-       u64     rx_bytes;
-       u64     tx_packets;
-       u64     tx_bytes;
-       struct u64_stats_sync   syncp;
-};
-
 static struct rtnl_link_stats64 *ipip_get_stats64(struct net_device *dev,
                                                  struct rtnl_link_stats64 *tot)
 {
@@ -465,7 +456,6 @@ drop:
 static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct ip_tunnel *tunnel = netdev_priv(dev);
-       struct pcpu_tstats *tstats;
        const struct iphdr  *tiph = &tunnel->parms.iph;
        u8     tos = tunnel->parms.iph.tos;
        __be16 df = tiph->frag_off;
@@ -592,9 +582,7 @@ 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);
-       tstats = this_cpu_ptr(dev->tstats);
-       __IPTUNNEL_XMIT(tstats, &dev->stats);
+       iptunnel_xmit(skb, dev);
        return NETDEV_TX_OK;
 
 tx_error_icmp:

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 12aa473..672101d 100644 (file)
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -116,15 +116,6 @@ static u32 HASH_ADDR(const struct in6_addr *addr)
 #define for_each_ip_tunnel_rcu(start) \
        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       u64     rx_packets;
-       u64     rx_bytes;
-       u64     tx_packets;
-       u64     tx_bytes;
-       struct u64_stats_sync   syncp;
-};
-
 static struct rtnl_link_stats64 *ip6gre_get_stats64(struct net_device *dev,
                struct rtnl_link_stats64 *tot)
 {

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 424ed45..8db4d9b 100644 (file)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -95,14 +95,6 @@ struct ip6_tnl_net {
        struct ip6_tnl __rcu **tnls[2];
 };
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       unsigned long   rx_packets;
-       unsigned long   rx_bytes;
-       unsigned long   tx_packets;
-       unsigned long   tx_bytes;
-} __attribute__((aligned(4*sizeof(unsigned long))));
-
 static struct net_device_stats *ip6_get_stats(struct net_device *dev)
 {
        struct pcpu_tstats sum = { 0 };

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index b543c56..ffe83ef 100644 (file)
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -88,15 +88,6 @@ struct sit_net {
 #define for_each_ip_tunnel_rcu(start) \
        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
-       u64     rx_packets;
-       u64     rx_bytes;
-       u64     tx_packets;
-       u64     tx_bytes;
-       struct u64_stats_sync   syncp;
-};
-
 static struct rtnl_link_stats64 *ipip6_get_stats64(struct net_device *dev,
                                                   struct rtnl_link_stats64 *tot)
 {
@@ -685,7 +676,6 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
                                     struct net_device *dev)
 {
        struct ip_tunnel *tunnel = netdev_priv(dev);
-       struct pcpu_tstats *tstats;
        const struct iphdr  *tiph = &tunnel->parms.iph;
        const struct ipv6hdr *iph6 = ipv6_hdr(skb);
        u8     tos = tunnel->parms.iph.tos;
@@ -866,9 +856,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
        if ((iph->ttl = tiph->ttl) == 0)
                iph->ttl        =       iph6->hop_limit;
 
-       nf_reset(skb);
-       tstats = this_cpu_ptr(dev->tstats);
-       __IPTUNNEL_XMIT(tstats, &dev->stats);
+       iptunnel_xmit(skb, dev);
        return NETDEV_TX_OK;
 
 tx_error_icmp: