[ETHTOOL]: Add ETHTOOL_[GS]FLAGS sub-ioctls

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 61 insertions, 0 deletions

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index c5e059352d4..6f8b78bcfd8 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -109,6 +109,32 @@ int ethtool_op_set_ufo(struct net_device *dev, u32 data)
         return 0;
 }
 
+/* the following list of flags are the same as their associated
+ * NETIF_F_xxx values in include/linux/netdevice.h
+ */
+static const u32 flags_dup_features =
+        ETH_FLAG_LRO;
+
+u32 ethtool_op_get_flags(struct net_device *dev)
+{
+        /* in the future, this function will probably contain additional
+         * handling for flags which are not so easily handled
+         * by a simple masking operation
+         */
+
+        return dev->features & flags_dup_features;
+}
+
+int ethtool_op_set_flags(struct net_device *dev, u32 data)
+{
+        if (data & ETH_FLAG_LRO)
+                dev->features |= NETIF_F_LRO;
+        else
+                dev->features &= ~NETIF_F_LRO;
+
+        return 0;
+}
+
 /* Handlers for each ethtool command */
 
 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
@@ -783,6 +809,33 @@ static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
         return 0;
 }
 
+static int ethtool_get_flags(struct net_device *dev, char __user *useraddr)
+{
+        struct ethtool_value edata = { ETHTOOL_GFLAGS };
+
+        if (!dev->ethtool_ops->get_flags)
+                return -EOPNOTSUPP;
+
+        edata.data = dev->ethtool_ops->get_flags(dev);
+
+        if (copy_to_user(useraddr, &edata, sizeof(edata)))
+                return -EFAULT;
+        return 0;
+}
+
+static int ethtool_set_flags(struct net_device *dev, char __user *useraddr)
+{
+        struct ethtool_value edata;
+
+        if (!dev->ethtool_ops->set_flags)
+                return -EOPNOTSUPP;
+
+        if (copy_from_user(&edata, useraddr, sizeof(edata)))
+                return -EFAULT;
+
+        return dev->ethtool_ops->set_flags(dev, edata.data);
+}
+
 /* The main entry point in this file.  Called from net/core/dev.c */
 
 int dev_ethtool(struct ifreq *ifr)
@@ -935,6 +988,12 @@ int dev_ethtool(struct ifreq *ifr)
         case ETHTOOL_SGSO:
                 rc = ethtool_set_gso(dev, useraddr);
                 break;
+        case ETHTOOL_GFLAGS:
+                rc = ethtool_get_flags(dev, useraddr);
+                break;
+        case ETHTOOL_SFLAGS:
+                rc = ethtool_set_flags(dev, useraddr);
+                break;
         default:
                 rc = -EOPNOTSUPP;
         }
@@ -959,3 +1018,5 @@ EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
 EXPORT_SYMBOL(ethtool_op_set_ufo);
 EXPORT_SYMBOL(ethtool_op_get_ufo);
+EXPORT_SYMBOL(ethtool_op_set_flags);
+EXPORT_SYMBOL(ethtool_op_get_flags);