LXR linux/drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h

   1#ifndef __MLX5E_ACCEL_H__
   2#define __MLX5E_ACCEL_H__
   3
   4#ifdef CONFIG_MLX5_ACCEL
   5
   6#include <linux/skbuff.h>
   7#include <linux/netdevice.h>
   8
   9static inline bool is_metadata_hdr_valid(struct sk_buff *skb)
  10{
  11        __be16 *ethtype;
  12
  13        if (unlikely(skb->len < ETH_HLEN + MLX5E_METADATA_ETHER_LEN))
  14                return false;
  15        ethtype = (__be16 *)(skb->data + ETH_ALEN * 2);
  16        if (*ethtype != cpu_to_be16(MLX5E_METADATA_ETHER_TYPE))
  17                return false;
  18        return true;
  19}
  20
  21static inline void remove_metadata_hdr(struct sk_buff *skb)
  22{
  23        struct ethhdr *old_eth;
  24        struct ethhdr *new_eth;
  25
  26        /* Remove the metadata from the buffer */
  27        old_eth = (struct ethhdr *)skb->data;
  28        new_eth = (struct ethhdr *)(skb->data + MLX5E_METADATA_ETHER_LEN);
  29        memmove(new_eth, old_eth, 2 * ETH_ALEN);
  30        /* Ethertype is already in its new place */
  31        skb_pull_inline(skb, MLX5E_METADATA_ETHER_LEN);
  32}
  33
  34#endif /* CONFIG_MLX5_ACCEL */
  35
  36#endif /* __MLX5E_EN_ACCEL_H__ */
  37