#include "vport-internal_dev.h"
#include "vport-netdev.h"
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) && \
+ !defined(HAVE_VLAN_BUG_WORKAROUND)
+#include <linux/module.h>
+
+static int vlan_tso __read_mostly = 0;
+module_param(vlan_tso, int, 0644);
+MODULE_PARM_DESC(vlan_tso, "Enable TSO for VLAN packets");
+#else
+#define vlan_tso true
+#endif
+
/* If the native device stats aren't 64 bit use the vport stats tracking instead. */
#define USE_VPORT_STATS (sizeof(((struct net_device_stats *)0)->rx_bytes) < sizeof(u64))
vport_receive(vport, skb);
}
+static bool dev_supports_vlan_tx(struct net_device *dev)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
+ /* Software fallback means every device supports vlan_tci on TX. */
+ return true;
+#elif defined(HAVE_VLAN_BUG_WORKAROUND)
+ return dev->features & NETIF_F_HW_VLAN_TX;
+#else
+ /* Assume that the driver is buggy. */
+ return false;
+#endif
+}
+
static int netdev_send(struct vport *vport, struct sk_buff *skb)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
skb->dev = netdev_vport->dev;
forward_ip_summed(skb);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
- if (vlan_tx_tag_present(skb)) {
+ if (vlan_tx_tag_present(skb) && !dev_supports_vlan_tx(skb->dev)) {
int err;
+ int features = 0;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
+ features = skb->dev->features & skb->dev->vlan_features;
+#endif
err = vswitch_skb_checksum_setup(skb);
if (unlikely(err)) {
return 0;
}
- if (skb_is_gso(skb)) {
+ if (!vlan_tso)
+ features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
+ NETIF_F_UFO | NETIF_F_FSO);
+
+ if (skb_is_gso(skb) &&
+ (!skb_gso_ok(skb, features) ||
+ unlikely(skb->ip_summed != CHECKSUM_PARTIAL))) {
struct sk_buff *nskb;
- nskb = skb_gso_segment(skb, 0);
+ nskb = skb_gso_segment(skb, features);
+ if (!nskb) {
+ if (unlikely(skb_cloned(skb) &&
+ pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
+ kfree_skb(skb);
+ return 0;
+ }
+
+ skb_shinfo(skb)->gso_type &= ~SKB_GSO_DODGY;
+ goto tag;
+ }
+
kfree_skb(skb);
skb = nskb;
if (IS_ERR(skb))
} while (skb);
return len;
- } else {
- skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
- if (unlikely(!skb))
- return 0;
- vlan_set_tci(skb, 0);
}
+
+tag:
+ skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
+ if (unlikely(!skb))
+ return 0;
+ vlan_set_tci(skb, 0);
}
-#endif
len = skb->len;
dev_queue_xmit(skb);