netdev - Re: [PATCH v4 bpf-next 15/22] xsk: add multi-buffer documentation

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Date: Wed, 28 Jun 2023 23:02:06 +0200
From: Toke Høiland-Jørgensen <toke@...hat.com>
To: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc: Magnus Karlsson <magnus.karlsson@...il.com>, Jakub Kicinski
 <kuba@...nel.org>, bpf@...r.kernel.org, ast@...nel.org,
 daniel@...earbox.net, andrii@...nel.org, netdev@...r.kernel.org,
 magnus.karlsson@...el.com, bjorn@...nel.org, tirthendu.sarkar@...el.com,
 simon.horman@...igine.com
Subject: Re: [PATCH v4 bpf-next 15/22] xsk: add multi-buffer documentation

> diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c
> index a4270fafdf11..b24244f768e3 100644
> --- a/net/core/netdev-genl.c
> +++ b/net/core/netdev-genl.c
> @@ -19,6 +19,8 @@ netdev_nl_dev_fill(struct net_device *netdev, struct sk_buff *rsp,
>  		return -EMSGSIZE;
>  
>  	if (nla_put_u32(rsp, NETDEV_A_DEV_IFINDEX, netdev->ifindex) ||
> +	    nla_put_u32(rsp, NETDEV_A_DEV_XDP_ZC_MAX_SEGS,
> +			netdev->xdp_zc_max_segs) ||

Should this be omitted if the driver doesn't support zero-copy at all?

-Toke