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Date: Thu, 6 Jun 2019 22:22:29 +0000
From: "Patel, Vedang" <vedang.patel@...el.com>
To: Stephen Hemminger <stephen@...workplumber.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Jamal Hadi Salim <jhs@...atatu.com>,
Cong Wang <xiyou.wangcong@...il.com>,
Jiri Pirko <jiri@...nulli.us>,
"Gomes, Vinicius" <vinicius.gomes@...el.com>,
"Dorileo, Leandro" <leandro.maciel.dorileo@...el.com>,
"jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
"m-karicheri2@...com" <m-karicheri2@...com>
Subject: Re: [PATCH iproute2 net-next v1 3/6] taprio: Add support for
enabling offload mode
> On Jun 6, 2019, at 2:46 PM, Stephen Hemminger <stephen@...workplumber.org> wrote:
>
> On Thu, 6 Jun 2019 21:13:50 +0000
> "Patel, Vedang" <vedang.patel@...el.com> wrote:
>
>>> On Jun 6, 2019, at 12:43 PM, Stephen Hemminger <stephen@...workplumber.org> wrote:
>>>
>>> On Thu, 6 Jun 2019 10:52:18 -0700
>>> Vedang Patel <vedang.patel@...el.com> wrote:
>>>
>>>> @@ -405,6 +420,7 @@ static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
>>>> struct rtattr *tb[TCA_TAPRIO_ATTR_MAX + 1];
>>>> struct tc_mqprio_qopt *qopt = 0;
>>>> __s32 clockid = CLOCKID_INVALID;
>>>> + __u32 offload_flags = 0;
>>>> int i;
>>>>
>>>> if (opt == NULL)
>>>> @@ -442,6 +458,11 @@ static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
>>>>
>>>> print_string(PRINT_ANY, "clockid", "clockid %s", get_clock_name(clockid));
>>>>
>>>> + if (tb[TCA_TAPRIO_ATTR_OFFLOAD_FLAGS])
>>>> + offload_flags = rta_getattr_u32(tb[TCA_TAPRIO_ATTR_OFFLOAD_FLAGS]);
>>>> +
>>>> + print_uint(PRINT_ANY, "offload", " offload %x", offload_flags);
>>>
>>> I don't think offload flags should be printed at all if not present.
>>>
>>> Why not?
>> Will make this in the next version.
>
> Mostly this is so that output doesn't change for users who aren't using offload or have old kernel.
Yes, I agree with that. But, this change alone won’t be enough. There is a minor kernel change also required which will not send the parameters if they are not set. I will include that change in the next version of my kernel patches.
Iproute2 patches incoming momentarily. This is the v2 which I was supposed to send out.
Thanks,
Vedang
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