net: add rx_handler data pointer

Add possibility to register rx_handler data pointer along with a rx_handler.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index a1abc10db08a..abdb19e547a7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2703,6 +2703,7 @@ void netif_nit_deliver(struct sk_buff *skb)
  *      netdev_rx_handler_register - register receive handler
  *      @dev: device to register a handler for
  *      @rx_handler: receive handler to register
+ *      @rx_handler_data: data pointer that is used by rx handler
  *
  *      Register a receive hander for a device. This handler will then be
  *      called from __netif_receive_skb. A negative errno code is returned
@@ -2711,13 +2712,15 @@ void netif_nit_deliver(struct sk_buff *skb)
  *      The caller must hold the rtnl_mutex.
  */
 int netdev_rx_handler_register(struct net_device *dev,
-                               rx_handler_func_t *rx_handler)
+                               rx_handler_func_t *rx_handler,
+                               void *rx_handler_data)
 {
         ASSERT_RTNL();
 
         if (dev->rx_handler)
                 return -EBUSY;
 
+        rcu_assign_pointer(dev->rx_handler_data, rx_handler_data);
         rcu_assign_pointer(dev->rx_handler, rx_handler);
 
         return 0;
@@ -2737,6 +2740,7 @@ void netdev_rx_handler_unregister(struct net_device *dev)
 
         ASSERT_RTNL();
         rcu_assign_pointer(dev->rx_handler, NULL);
+        rcu_assign_pointer(dev->rx_handler_data, NULL);
 }
 EXPORT_SYMBOL_GPL(netdev_rx_handler_unregister);