netdev - Re: [PATCH bpf-next v3 08/18] bpf: net_sched: Support implementation of Qdisc

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Message-ID: <20250204141851.522ae938@kernel.org>
Date: Tue, 4 Feb 2025 14:18:51 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Amery Hung <ameryhung@...il.com>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, daniel@...earbox.net,
 andrii@...nel.org, alexei.starovoitov@...il.com, martin.lau@...nel.org,
 edumazet@...gle.com, xiyou.wangcong@...il.com, cong.wang@...edance.com,
 jhs@...atatu.com, sinquersw@...il.com, toke@...hat.com, jiri@...nulli.us,
 stfomichev@...il.com, ekarani.silvestre@....ufcg.edu.br,
 yangpeihao@...u.edu.cn, yepeilin.cs@...il.com, ming.lei@...hat.com,
 kernel-team@...a.com
Subject: Re: [PATCH bpf-next v3 08/18] bpf: net_sched: Support
 implementation of Qdisc_ops in bpf

On Fri, 31 Jan 2025 11:28:47 -0800 Amery Hung wrote:
> +		if (new &&
> +		    !(parent->flags & TCQ_F_MQROOT) &&
> +		    new->ops->owner == BPF_MODULE_OWNER) {
> +			NL_SET_ERR_MSG(extack, "BPF qdisc not supported on a non root");
> +			return -EINVAL;
> +		}

This check should live in bpf_qdisc.c