netdev - Re: [patch net-next 2/2] sched: introduce vlan action

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Date:	Wed, 12 Nov 2014 13:34:45 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Cong Wang <cwang@...pensource.com>
Cc:	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Pravin B Shelar <pshelar@...ira.com>,
	Tom Herbert <therbert@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>, willemb@...gle.com,
	Daniel Borkmann <dborkman@...hat.com>, mst@...hat.com,
	Florian Westphal <fw@...len.de>, Paul.Durrant@...rix.com,
	Thomas Graf <tgraf@...g.ch>
Subject: Re: [patch net-next 2/2] sched: introduce vlan action

Tue, Nov 11, 2014 at 11:33:21PM CET, cwang@...pensource.com wrote:
>On Tue, Nov 11, 2014 at 2:13 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>> +static int tcf_vlan_init(struct net *net, struct nlattr *nla,
>> +                        struct nlattr *est, struct tc_action *a,
>> +                        int ovr, int bind)
>> +{
>> +       struct nlattr *tb[TCA_VLAN_MAX + 1];
>> +       struct tc_vlan *parm;
>> +       struct tcf_vlan *v;
>> +       int action;
>> +       __be16 push_vid = 0;
>> +       __be16 push_proto = 0;
>> +       int ret = 0;
>> +       int err;
>> +
>> +       if (!nla)
>> +               return -EINVAL;
>> +
>> +       err = nla_parse_nested(tb, TCA_VLAN_MAX, nla, vlan_policy);
>> +       if (err < 0)
>> +               return err;
>> +
>> +       if (!tb[TCA_VLAN_PARMS])
>> +               return -EINVAL;
>> +       parm = nla_data(tb[TCA_VLAN_PARMS]);
>> +       switch (parm->v_action) {
>> +       case TCA_VLAN_ACT_POP:
>> +               break;
>> +       case TCA_VLAN_ACT_PUSH:
>> +               if (!tb[TCA_VLAN_PUSH_VLAN_ID])
>> +                       return -EINVAL;
>> +               push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
>
>nla_get_be16() ?

No. I made this the same as it is done in net/8021q/vlan_netlink.c

>
>
>> +               if (push_vid >= VLAN_VID_MASK)
>> +                       return -ERANGE;
>> +
>
>htons() ?
>
>[...]
>
>> +static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
>> +                        int bind, int ref)
>> +{
>> +       unsigned char *b = skb_tail_pointer(skb);
>> +       struct tcf_vlan *v = a->priv;
>> +       struct tc_vlan opt = {
>> +               .index    = v->tcf_index,
>> +               .refcnt   = v->tcf_refcnt - ref,
>> +               .bindcnt  = v->tcf_bindcnt - bind,
>> +               .action   = v->tcf_action,
>> +               .v_action = v->tcfv_action,
>> +       };
>> +       struct tcf_t t;
>> +
>> +       if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
>> +               goto nla_put_failure;
>> +
>> +       if (v->tcfv_action == TCA_VLAN_ACT_PUSH &&
>> +           nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, v->tcfv_push_vid) &&
>> +           nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL, v->tcfv_push_proto))
>> +               goto nla_put_failure;
>
>nla_put_be16() ?
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