- patches.arch/x86_mce_intel_decode_physical_address.patch:

[linux-flexiantxendom0-3.2.10.git] / drivers / net / xen-netfront.c

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 8f3bd2f..d504e2b 100644 (file)
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -36,6 +36,8 @@
 #include <linux/skbuff.h>
 #include <linux/ethtool.h>
 #include <linux/if_ether.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
 #include <linux/moduleparam.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
@@ -768,6 +770,45 @@ static RING_IDX xennet_fill_frags(struct netfront_info *np,
        return cons;
 }
 
+static int skb_checksum_setup(struct sk_buff *skb)
+{
+       struct iphdr *iph;
+       unsigned char *th;
+       int err = -EPROTO;
+
+       if (skb->protocol != htons(ETH_P_IP))
+               goto out;
+
+       iph = (void *)skb->data;
+       th = skb->data + 4 * iph->ihl;
+       if (th >= skb_tail_pointer(skb))
+               goto out;
+
+       skb->csum_start = th - skb->head;
+       switch (iph->protocol) {
+       case IPPROTO_TCP:
+               skb->csum_offset = offsetof(struct tcphdr, check);
+               break;
+       case IPPROTO_UDP:
+               skb->csum_offset = offsetof(struct udphdr, check);
+               break;
+       default:
+               if (net_ratelimit())
+                       printk(KERN_ERR "Attempting to checksum a non-"
+                              "TCP/UDP packet, dropping a protocol"
+                              " %d packet", iph->protocol);
+               goto out;
+       }
+
+       if ((th + skb->csum_offset + 2) > skb_tail_pointer(skb))
+               goto out;
+
+       err = 0;
+
+out:
+       return err;
+}
+
 static int handle_incoming_queue(struct net_device *dev,
                                 struct sk_buff_head *rxq)
 {
@@ -1754,6 +1795,7 @@ static int __devexit xennet_remove(struct xenbus_device *dev)
 
 static struct xenbus_driver netfront_driver = {
        .name = "vif",
+       .owner = THIS_MODULE,
        .ids = netfront_ids,
        .probe = netfront_probe,
        .remove = __devexit_p(xennet_remove),