On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki <akihiko.odaki@xxxxxxxxxx> wrote:
>
> tun_vnet_hash can use this flag to indicate it stored virtio-net hash
> cache to cb.
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@xxxxxxxxxx>
> ---
> include/linux/skbuff.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
> index 4174c4b82d13..e638f157c13c 100644
> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -837,6 +837,7 @@ typedef unsigned char *sk_buff_data_t;
> * @truesize: Buffer size
> * @users: User count - see {datagram,tcp}.c
> * @extensions: allocated extensions, valid if active_extensions is nonzero
> + * @tun_vnet_hash: tun stored virtio-net hash cache to cb
> */
>
> struct sk_buff {
> @@ -989,6 +990,7 @@ struct sk_buff {
> #if IS_ENABLED(CONFIG_IP_SCTP)
> __u8 csum_not_inet:1;
> #endif
> + __u8 tun_vnet_hash:1;
sk_buff space is very limited.
No need to extend it, especially for code that stays within a single
subsystem (tun).
To a lesser extent the same point applies to the qdisc_skb_cb.
