vlan: adds fcoe offload related net_device_ops and updates fcoe_ddp_xid field

Adds fcoe offload related net_device_ops functions vlan_dev_fcoe_ddp_setup
and vlan_dev_fcoe_ddp_done, their implementation simply calls real eth device
net_device_ops for FCoE DDP setup and done operations.

Updates VLAN netdev field value for fcoe_ddp_xid from real eth device netdev.

Above changes are required for fcoe DDP offload working on a VLAN interface.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 42 insertions, 0 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index a1f16303703a..e814794b0a1a 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -391,6 +391,9 @@ static void vlan_transfer_features(struct net_device *dev,
         vlandev->features &= ~dev->vlan_features;
         vlandev->features |= dev->features & dev->vlan_features;
         vlandev->gso_max_size = dev->gso_max_size;
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+        vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
+#endif
 
         if (old_features != vlandev->features)
                 netdev_features_change(vlandev);
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 96bad8f233e2..6e695acd1ae0 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -561,6 +561,33 @@ static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
         return err;
 }
 
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
+                                   struct scatterlist *sgl, unsigned int sgc)
+{
+        struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
+        const struct net_device_ops *ops = real_dev->netdev_ops;
+        int rc = 0;
+
+        if (ops->ndo_fcoe_ddp_setup)
+                rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
+
+        return rc;
+}
+
+static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
+{
+        struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
+        const struct net_device_ops *ops = real_dev->netdev_ops;
+        int len = 0;
+
+        if (ops->ndo_fcoe_ddp_done)
+                len = ops->ndo_fcoe_ddp_done(real_dev, xid);
+
+        return len;
+}
+#endif
+
 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
 {
         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
@@ -635,6 +662,10 @@ static int vlan_dev_init(struct net_device *dev)
         if (is_zero_ether_addr(dev->broadcast))
                 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
 
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+        dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
+#endif
+
         if (real_dev->features & NETIF_F_HW_VLAN_TX) {
                 dev->header_ops      = real_dev->header_ops;
                 dev->hard_header_len = real_dev->hard_header_len;
@@ -715,6 +746,10 @@ static const struct net_device_ops vlan_netdev_ops = {
         .ndo_change_rx_flags    = vlan_dev_change_rx_flags,
         .ndo_do_ioctl           = vlan_dev_ioctl,
         .ndo_neigh_setup        = vlan_dev_neigh_setup,
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+        .ndo_fcoe_ddp_setup     = vlan_dev_fcoe_ddp_setup,
+        .ndo_fcoe_ddp_done      = vlan_dev_fcoe_ddp_done,
+#endif
 };
 
 static const struct net_device_ops vlan_netdev_accel_ops = {
@@ -731,6 +766,10 @@ static const struct net_device_ops vlan_netdev_accel_ops = {
         .ndo_change_rx_flags    = vlan_dev_change_rx_flags,
         .ndo_do_ioctl           = vlan_dev_ioctl,
         .ndo_neigh_setup        = vlan_dev_neigh_setup,
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+        .ndo_fcoe_ddp_setup     = vlan_dev_fcoe_ddp_setup,
+        .ndo_fcoe_ddp_done      = vlan_dev_fcoe_ddp_done,
+#endif
 };
 
 void vlan_setup(struct net_device *dev)