5 files changed, 77 insertions, 16 deletions

diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index b4a9a3c844b2..55b8dec86233 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -87,9 +87,13 @@ struct pending_tx_info {
 struct xenvif_rx_meta {
         int id;
         int size;
+        int gso_type;
         int gso_size;
 };
 
+#define GSO_BIT(type) \
+        (1 << XEN_NETIF_GSO_TYPE_ ## type)
+
 /* Discriminate from any valid pending_idx value. */
 #define INVALID_PENDING_IDX 0xFFFF
 
@@ -150,9 +154,10 @@ struct xenvif {
         u8               fe_dev_addr[6];
 
         /* Frontend feature information. */
+        int gso_mask;
+        int gso_prefix_mask;
+
         u8 can_sg:1;
-        u8 gso:1;
-        u8 gso_prefix:1;
         u8 ip_csum:1;
         u8 ipv6_csum:1;
 
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index cb0d8ea3d9f2..e4aa26748f80 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -214,8 +214,10 @@ static netdev_features_t xenvif_fix_features(struct net_device *dev,
 
         if (!vif->can_sg)
                 features &= ~NETIF_F_SG;
-        if (!vif->gso && !vif->gso_prefix)
+        if (~(vif->gso_mask | vif->gso_prefix_mask) & GSO_BIT(TCPV4))
                 features &= ~NETIF_F_TSO;
+        if (~(vif->gso_mask | vif->gso_prefix_mask) & GSO_BIT(TCPV6))
+                features &= ~NETIF_F_TSO6;
         if (!vif->ip_csum)
                 features &= ~NETIF_F_IP_CSUM;
         if (!vif->ipv6_csum)
@@ -320,7 +322,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
         dev->netdev_ops = &xenvif_netdev_ops;
         dev->hw_features = NETIF_F_SG |
                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-                NETIF_F_TSO;
+                NETIF_F_TSO | NETIF_F_TSO6;
         dev->features = dev->hw_features | NETIF_F_RXCSUM;
         SET_ETHTOOL_OPS(dev, &xenvif_ethtool_ops);
 
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 0e327d46a139..828fdab4f1a4 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -142,7 +142,7 @@ static int max_required_rx_slots(struct xenvif *vif)
         int max = DIV_ROUND_UP(vif->dev->mtu, PAGE_SIZE);
 
         /* XXX FIXME: RX path dependent on MAX_SKB_FRAGS */
-        if (vif->can_sg || vif->gso || vif->gso_prefix)
+        if (vif->can_sg || vif->gso_mask || vif->gso_prefix_mask)
                 max += MAX_SKB_FRAGS + 1; /* extra_info + frags */
 
         return max;
@@ -314,6 +314,7 @@ static struct xenvif_rx_meta *get_next_rx_buffer(struct xenvif *vif,
         req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
 
         meta = npo->meta + npo->meta_prod++;
+        meta->gso_type = XEN_NETIF_GSO_TYPE_NONE;
         meta->gso_size = 0;
         meta->size = 0;
         meta->id = req->id;
@@ -336,6 +337,7 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct sk_buff *skb,
         struct gnttab_copy *copy_gop;
         struct xenvif_rx_meta *meta;
         unsigned long bytes;
+        int gso_type;
 
         /* Data must not cross a page boundary. */
         BUG_ON(size + offset > PAGE_SIZE<<compound_order(page));
@@ -394,7 +396,14 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct sk_buff *skb,
                 }
 
                 /* Leave a gap for the GSO descriptor. */
-                if (*head && skb_shinfo(skb)->gso_size && !vif->gso_prefix)
+                if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
+                        gso_type = XEN_NETIF_GSO_TYPE_TCPV4;
+                else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
+                        gso_type = XEN_NETIF_GSO_TYPE_TCPV6;
+                else
+                        gso_type = XEN_NETIF_GSO_TYPE_NONE;
+
+                if (*head && ((1 << gso_type) & vif->gso_mask))
                         vif->rx.req_cons++;
 
                 *head = 0; /* There must be something in this buffer now. */
@@ -425,14 +434,28 @@ static int xenvif_gop_skb(struct sk_buff *skb,
         unsigned char *data;
         int head = 1;
         int old_meta_prod;
+        int gso_type;
+        int gso_size;
 
         old_meta_prod = npo->meta_prod;
 
+        if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) {
+                gso_type = XEN_NETIF_GSO_TYPE_TCPV4;
+                gso_size = skb_shinfo(skb)->gso_size;
+        } else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) {
+                gso_type = XEN_NETIF_GSO_TYPE_TCPV6;
+                gso_size = skb_shinfo(skb)->gso_size;
+        } else {
+                gso_type = XEN_NETIF_GSO_TYPE_NONE;
+                gso_size = 0;
+        }
+
         /* Set up a GSO prefix descriptor, if necessary */
-        if (skb_shinfo(skb)->gso_size && vif->gso_prefix) {
+        if ((1 << skb_shinfo(skb)->gso_type) & vif->gso_prefix_mask) {
                 req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
                 meta = npo->meta + npo->meta_prod++;
-                meta->gso_size = skb_shinfo(skb)->gso_size;
+                meta->gso_type = gso_type;
+                meta->gso_size = gso_size;
                 meta->size = 0;
                 meta->id = req->id;
         }
@@ -440,10 +463,13 @@ static int xenvif_gop_skb(struct sk_buff *skb,
         req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
         meta = npo->meta + npo->meta_prod++;
 
-        if (!vif->gso_prefix)
-                meta->gso_size = skb_shinfo(skb)->gso_size;
-        else
+        if ((1 << gso_type) & vif->gso_mask) {
+                meta->gso_type = gso_type;
+                meta->gso_size = gso_size;
+        } else {
+                meta->gso_type = XEN_NETIF_GSO_TYPE_NONE;
                 meta->gso_size = 0;
+        }
 
         meta->size = 0;
         meta->id = req->id;
@@ -589,7 +615,8 @@ void xenvif_rx_action(struct xenvif *vif)
 
                 vif = netdev_priv(skb->dev);
 
-                if (vif->meta[npo.meta_cons].gso_size && vif->gso_prefix) {
+                if ((1 << vif->meta[npo.meta_cons].gso_type) &
+                    vif->gso_prefix_mask) {
                         resp = RING_GET_RESPONSE(&vif->rx,
                                                  vif->rx.rsp_prod_pvt++);
 
@@ -626,7 +653,8 @@ void xenvif_rx_action(struct xenvif *vif)
                                         vif->meta[npo.meta_cons].size,
                                         flags);
 
-                if (vif->meta[npo.meta_cons].gso_size && !vif->gso_prefix) {
+                if ((1 << vif->meta[npo.meta_cons].gso_type) &
+                    vif->gso_mask) {
                         struct xen_netif_extra_info *gso =
                                 (struct xen_netif_extra_info *)
                                 RING_GET_RESPONSE(&vif->rx,
@@ -634,8 +662,8 @@ void xenvif_rx_action(struct xenvif *vif)
 
                         resp->flags |= XEN_NETRXF_extra_info;
 
+                        gso->u.gso.type = vif->meta[npo.meta_cons].gso_type;
                         gso->u.gso.size = vif->meta[npo.meta_cons].gso_size;
-                        gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4;
                         gso->u.gso.pad = 0;
                         gso->u.gso.features = 0;
 
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 02cb00bebdc9..f0358992b04f 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -577,15 +577,40 @@ static int connect_rings(struct backend_info *be)
                 val = 0;
         vif->can_sg = !!val;
 
+        vif->gso_mask = 0;
+        vif->gso_prefix_mask = 0;
+
         if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-gso-tcpv4",
                          "%d", &val) < 0)
                 val = 0;
-        vif->gso = !!val;
+        if (val)
+                vif->gso_mask |= GSO_BIT(TCPV4);
 
         if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-gso-tcpv4-prefix",
                          "%d", &val) < 0)
                 val = 0;
-        vif->gso_prefix = !!val;
+        if (val)
+                vif->gso_prefix_mask |= GSO_BIT(TCPV4);
+
+        if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-gso-tcpv6",
+                         "%d", &val) < 0)
+                val = 0;
+        if (val)
+                vif->gso_mask |= GSO_BIT(TCPV6);
+
+        if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-gso-tcpv6-prefix",
+                         "%d", &val) < 0)
+                val = 0;
+        if (val)
+                vif->gso_prefix_mask |= GSO_BIT(TCPV6);
+
+        if (vif->gso_mask & vif->gso_prefix_mask) {
+                xenbus_dev_fatal(dev, err,
+                                 "%s: gso and gso prefix flags are not "
+                                 "mutually exclusive",
+                                 dev->otherend);
+                return -EOPNOTSUPP;
+        }
 
         if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-no-csum-offload",
                          "%d", &val) < 0)
diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h
index 5e766ebe77f6..c50061db6098 100644
--- a/include/xen/interface/io/netif.h
+++ b/include/xen/interface/io/netif.h
@@ -110,6 +110,7 @@ struct xen_netif_tx_request {
 #define  XEN_NETIF_EXTRA_FLAG_MORE      (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
 
 /* GSO types */
+#define XEN_NETIF_GSO_TYPE_NONE         (0)
 #define XEN_NETIF_GSO_TYPE_TCPV4        (1)
 #define XEN_NETIF_GSO_TYPE_TCPV6        (2)