netdev - Re: [net-next PATCH 1/5] sch_htb: Allow HTB priority parameter in offload mode

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Date:   Fri, 13 Jan 2023 14:19:38 +0200
From:   Maxim Mikityanskiy <maxtram95@...il.com>
To:     Hariprasad Kelam <hkelam@...vell.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com,
        edumazet@...gle.com, sgoutham@...vell.com, lcherian@...vell.com,
        gakula@...vell.com, jerinj@...vell.com, sbhatta@...vell.com,
        Naveen Mamindlapalli <naveenm@...vell.com>,
        Tariq Toukan <tariqt@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Gal Pressman <gal@...dia.com>
Subject: Re: [net-next PATCH 1/5] sch_htb: Allow HTB priority parameter in
 offload mode

On Thu, Jan 12, 2023 at 11:01:16PM +0530, Hariprasad Kelam wrote:
> From: Naveen Mamindlapalli <naveenm@...vell.com>
> 
> The current implementation of HTB offload returns the EINVAL error
> for unsupported parameters like prio and quantum. This patch removes
> the error returning checks for 'prio' parameter and populates its
> value to tc_htb_qopt_offload structure such that driver can use the
> same.
> 
> Signed-off-by: Naveen Mamindlapalli <naveenm@...vell.com>
> Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
> Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
> ---
>  include/net/pkt_cls.h | 1 +
>  net/sched/sch_htb.c   | 7 +++----
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
> index 4cabb32a2ad9..02afb1baf39d 100644
> --- a/include/net/pkt_cls.h
> +++ b/include/net/pkt_cls.h
> @@ -864,6 +864,7 @@ struct tc_htb_qopt_offload {
>  	u16 qid;
>  	u64 rate;
>  	u64 ceil;
> +	u8 prio;
>  };
>  
>  #define TC_HTB_CLASSID_ROOT U32_MAX
> diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
> index 2238edece1a4..f2d034cdd7bd 100644
> --- a/net/sched/sch_htb.c
> +++ b/net/sched/sch_htb.c
> @@ -1806,10 +1806,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
>  			NL_SET_ERR_MSG(extack, "HTB offload doesn't support the quantum parameter");
>  			goto failure;
>  		}
> -		if (hopt->prio) {
> -			NL_SET_ERR_MSG(extack, "HTB offload doesn't support the prio parameter");
> -			goto failure;
> -		}

The check should go to mlx5e then.

>  	}
>  
>  	/* Keeping backward compatible with rate_table based iproute2 tc */
> @@ -1905,6 +1901,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
>  					TC_HTB_CLASSID_ROOT,
>  				.rate = max_t(u64, hopt->rate.rate, rate64),
>  				.ceil = max_t(u64, hopt->ceil.rate, ceil64),
> +				.prio = hopt->prio,
>  				.extack = extack,
>  			};
>  			err = htb_offload(dev, &offload_opt);
> @@ -1925,6 +1922,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
>  					TC_H_MIN(parent->common.classid),
>  				.rate = max_t(u64, hopt->rate.rate, rate64),
>  				.ceil = max_t(u64, hopt->ceil.rate, ceil64),
> +				.prio = hopt->prio,
>  				.extack = extack,
>  			};
>  			err = htb_offload(dev, &offload_opt);
> @@ -2010,6 +2008,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
>  				.classid = cl->common.classid,
>  				.rate = max_t(u64, hopt->rate.rate, rate64),
>  				.ceil = max_t(u64, hopt->ceil.rate, ceil64),
> +				.prio = hopt->prio,
>  				.extack = extack,
>  			};
>  			err = htb_offload(dev, &offload_opt);
> -- 
> 2.17.1
>