diff options
Diffstat (limited to 'include/net/dst_metadata.h')
| -rw-r--r-- | include/net/dst_metadata.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h index af9d5382f6cb..6816f0fa5693 100644 --- a/include/net/dst_metadata.h +++ b/include/net/dst_metadata.h @@ -60,6 +60,39 @@ static inline struct metadata_dst *tun_rx_dst(int md_size) return tun_dst; } +static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb) +{ + struct metadata_dst *md_dst = skb_metadata_dst(skb); + int md_size; + struct metadata_dst *new_md; + + if (!md_dst) + return ERR_PTR(-EINVAL); + + md_size = md_dst->u.tun_info.options_len; + new_md = metadata_dst_alloc(md_size, GFP_ATOMIC); + if (!new_md) + return ERR_PTR(-ENOMEM); + + memcpy(&new_md->u.tun_info, &md_dst->u.tun_info, + sizeof(struct ip_tunnel_info) + md_size); + skb_dst_drop(skb); + dst_hold(&new_md->dst); + skb_dst_set(skb, &new_md->dst); + return new_md; +} + +static inline struct ip_tunnel_info *skb_tunnel_info_unclone(struct sk_buff *skb) +{ + struct metadata_dst *dst; + + dst = tun_dst_unclone(skb); + if (IS_ERR(dst)) + return NULL; + + return &dst->u.tun_info; +} + static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb, __be16 flags, __be64 tunnel_id, |