Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / net / loopback.c

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 8ffa894..b79d6e8 100644 (file)
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -7,7 +7,7 @@
  *
  * Version:    @(#)loopback.c  1.0.4b  08/16/93
  *
- * Authors:    Ross Biro, <bir7@leland.Stanford.Edu>
+ * Authors:    Ross Biro
  *             Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  *             Donald Becker, <becker@scyld.com>
  *
@@ -49,6 +49,7 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
+#include <linux/ethtool.h>
 #include <net/sock.h>
 #include <net/checksum.h>
 #include <linux/if_ether.h>    /* For the statistics structure. */
@@ -67,6 +68,7 @@ static DEFINE_PER_CPU(struct net_device_stats, loopback_stats);
  * of largesending device modulo TCP checksum, which is ignored for loopback.
  */
 
+#ifdef LOOPBACK_TSO
 static void emulate_large_send_offload(struct sk_buff *skb)
 {
        struct iphdr *iph = skb->nh.iph;
@@ -118,6 +120,7 @@ static void emulate_large_send_offload(struct sk_buff *skb)
 
        dev_kfree_skb(skb);
 }
+#endif /* LOOPBACK_TSO */
 
 /*
  * The higher levels take care of making this non-reentrant (it's
@@ -129,12 +132,13 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
 
        skb_orphan(skb);
 
-       skb->protocol=eth_type_trans(skb,dev);
-       skb->dev=dev;
+       skb->protocol = eth_type_trans(skb,dev);
+       skb->dev = dev;
 #ifndef LOOPBACK_MUST_CHECKSUM
        skb->ip_summed = CHECKSUM_UNNECESSARY;
 #endif
 
+#ifdef LOOPBACK_TSO
        if (skb_shinfo(skb)->tso_size) {
                BUG_ON(skb->protocol != htons(ETH_P_IP));
                BUG_ON(skb->nh.iph->protocol != IPPROTO_TCP);
@@ -142,14 +146,14 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
                emulate_large_send_offload(skb);
                return 0;
        }
-
+#endif
        dev->last_rx = jiffies;
 
        lb_stats = &per_cpu(loopback_stats, get_cpu());
        lb_stats->rx_bytes += skb->len;
-       lb_stats->tx_bytes += skb->len;
+       lb_stats->tx_bytes = lb_stats->rx_bytes;
        lb_stats->rx_packets++;
-       lb_stats->tx_packets++;
+       lb_stats->tx_packets = lb_stats->rx_packets;
        put_cpu();
 
        netif_rx(skb);
@@ -168,11 +172,9 @@ static struct net_device_stats *get_stats(struct net_device *dev)
 
        memset(stats, 0, sizeof(struct net_device_stats));
 
-       for (i=0; i < NR_CPUS; i++) {
+       for_each_possible_cpu(i) {
                struct net_device_stats *lb_stats;
 
-               if (!cpu_possible(i)) 
-                       continue;
                lb_stats = &per_cpu(loopback_stats, i);
                stats->rx_bytes   += lb_stats->rx_bytes;
                stats->tx_bytes   += lb_stats->tx_bytes;
@@ -183,6 +185,17 @@ static struct net_device_stats *get_stats(struct net_device *dev)
        return stats;
 }
 
+static u32 loopback_get_link(struct net_device *dev)
+{
+       return 1;
+}
+
+static struct ethtool_ops loopback_ethtool_ops = {
+       .get_link               = loopback_get_link,
+       .get_tso                = ethtool_op_get_tso,
+       .set_tso                = ethtool_op_set_tso,
+};
+
 struct net_device loopback_dev = {
        .name                   = "lo",
        .mtu                    = (16 * 1024) + 20 + 20 + 12,
@@ -196,12 +209,16 @@ struct net_device loopback_dev = {
        .type                   = ARPHRD_LOOPBACK,      /* 0x0001*/
        .rebuild_header         = eth_rebuild_header,
        .flags                  = IFF_LOOPBACK,
-       .features               = NETIF_F_SG|NETIF_F_FRAGLIST
-                                 |NETIF_F_NO_CSUM|NETIF_F_HIGHDMA
-                                 |NETIF_F_LLTX,
+       .features               = NETIF_F_SG | NETIF_F_FRAGLIST
+#ifdef LOOPBACK_TSO
+                                 | NETIF_F_TSO
+#endif
+                                 | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA
+                                 | NETIF_F_LLTX,
+       .ethtool_ops            = &loopback_ethtool_ops,
 };
 
-/* Setup and register the of the LOOPBACK device. */
+/* Setup and register the loopback device. */
 int __init loopback_init(void)
 {
        struct net_device_stats *stats;