On Wed, 26 Mar 2014 12:00:26 -0400
Vlad Yasevich <[email protected]> wrote:

> Signed-off-by: Vlad Yasevich <[email protected]>
> ---
>  include/linux/netdevice.h | 1 +
>  net/core/dev.c            | 3 ++-
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index e8eeebd..d855794 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -2551,6 +2551,7 @@ int dev_get_phys_port_id(struct net_device *dev,
>  int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
>                       struct netdev_queue *txq);
>  int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
> +bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
>  
>  extern int           netdev_budget;
>  
> diff --git a/net/core/dev.c b/net/core/dev.c
> index b1b0c8d..a98f7fa 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -1645,7 +1645,7 @@ static inline void net_timestamp_set(struct sk_buff 
> *skb)
>                       __net_timestamp(SKB);           \
>       }                                               \
>  
> -static inline bool is_skb_forwardable(struct net_device *dev,
> +bool is_skb_forwardable(struct net_device *dev,
>                                     struct sk_buff *skb)
>  {
>       unsigned int len;
> @@ -1665,6 +1665,7 @@ static inline bool is_skb_forwardable(struct net_device 
> *dev,
>  
>       return false;
>  }
> +EXPORT_SYMBOL_GPL(is_skb_forwardable);
>  
>  /**
>   * dev_forward_skb - loopback an skb to another netif

This will allow an arbitrary 1522 byte frame to be forwarded.
Not sure if this ok.

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