Willem de Bruijn
2023-Oct-08 18:39 UTC
[RFC PATCH 1/7] net: skbuff: Add tun_vnet_hash flag
On Sun, Oct 8, 2023 at 7:22?AM Akihiko Odaki <akihiko.odaki at daynix.com> 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 at daynix.com> > --- > 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.