netdev - Re: [patch net-next v3 05/10] net: sched: keep track of offloaded filters and check tc offload feature

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Message-ID: <20171214112243.14e72b11@cakuba.netronome.com>
Date:   Thu, 14 Dec 2017 11:22:43 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, jhs@...atatu.com,
        xiyou.wangcong@...il.com, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, ogerlitz@...lanox.com,
        john.fastabend@...il.com, daniel@...earbox.net
Subject: Re: [patch net-next v3 05/10] net: sched: keep track of offloaded
 filters and check tc offload feature

On Wed, 13 Dec 2017 16:10:33 +0100, Jiri Pirko wrote:
> diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
> index 69d7e9a..9cf61e7 100644
> --- a/net/sched/cls_bpf.c
> +++ b/net/sched/cls_bpf.c
> @@ -170,8 +170,10 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
>  			cls_bpf_offload_cmd(tp, prog, TC_CLSBPF_DESTROY);
>  			return err;
>  		} else if (err > 0) {
> -			prog->gen_flags |= TCA_CLS_FLAGS_IN_HW;
> +			tcf_block_offload_inc(block, &prog->gen_flags);
>  		}
> +	} else {
> +		tcf_block_offload_dec(block, &prog->gen_flags);
>  	}
>  
>  	if (addorrep && skip_sw && !(prog->gen_flags & TCA_CLS_FLAGS_IN_HW))

The in_hw reporting also seems broken.

tools/testing/selftests/bpf/test_offload.py catches this.