Re: [RFC PATCH 1/7] net: skbuff: Add tun_vnet_hash flag
From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Date: 2023-10-08 18:39:52
Also in:
bpf, kvm, linux-kselftest, lkml, netdev
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki [off-list ref] wrote:
quoted hunk
tun_vnet_hash can use this flag to indicate it stored virtio-net hash cache to cb. Signed-off-by: Akihiko Odaki <redacted> --- 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. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization