Hi,
On Sun, Dec 08, 2019 at 12:41:31PM +0800, Xin Long wrote:
> To keep consistent with ipgre_policy, it's better to parse
> ERSPAN_VERSION attr as u8, as it does in act_tunnel_key,
> cls_flower and ip_tunnel_core.
>
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
> ---
> net/netfilter/nft_tunnel.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/net/netfilter/nft_tunnel.c b/net/netfilter/nft_tunnel.c
> index 3d4c2ae..f76cd7d 100644
> --- a/net/netfilter/nft_tunnel.c
> +++ b/net/netfilter/nft_tunnel.c
> @@ -248,8 +248,9 @@ static int nft_tunnel_obj_vxlan_init(const struct nlattr *attr,
> }
>
> static const struct nla_policy nft_tunnel_opts_erspan_policy[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1] = {
> + [NFTA_TUNNEL_KEY_ERSPAN_VERSION] = { .type = NLA_U8 },
> [NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX] = { .type = NLA_U32 },
> - [NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 },
> + [NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 },
> [NFTA_TUNNEL_KEY_ERSPAN_V2_HWID] = { .type = NLA_U8 },
> };
>
> @@ -266,7 +267,7 @@ static int nft_tunnel_obj_erspan_init(const struct nlattr *attr,
> if (err < 0)
> return err;
>
> - version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]));
> + version = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]);
I think NFTA_TUNNEL_KEY_ERSPAN_VERSION as 32-bit is just fine.
Netlink will be adding the padding anyway for u8.
I would suggest you leave this as is.
Thanks.
