netdev - Re: [PATCH net-next 09/11] net: dsa: Move FDB dump implementation inside DSA

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Date:   Wed, 19 Jul 2017 15:00:39 +0300
From:   Arkadi Sharshevsky <arkadis@...lanox.com>
To:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...nulli.us, ivecera@...hat.com,
        f.fainelli@...il.com, andrew@...n.ch, Woojung.Huh@...rochip.com,
        stephen@...workplumber.org, mlxsw@...lanox.com
Subject: Re: [PATCH net-next 09/11] net: dsa: Move FDB dump implementation
 inside DSA



On 07/18/2017 09:06 PM, Vivien Didelot wrote:
> Hi Arkadi,
> 
> Arkadi Sharshevsky <arkadis@...lanox.com> writes:
> 
>> +typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
>> +			      u16 ndm_state, void *data);
> 
> Can I ask you to change u16 ndm_state for bool is_static at the same
> time? Ethernet switches do not need to report more than that.
>

Will fix, thanks.

>> +static int
>> +dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
>> +			   u16 ndm_state, void *data)
>> +{
>> +	struct dsa_slave_dump_ctx *dump = data;
>> +	u32 portid = NETLINK_CB(dump->cb->skb).portid;
>> +	u32 seq = dump->cb->nlh->nlmsg_seq;
>> +	struct nlmsghdr *nlh;
>> +	struct ndmsg *ndm;
>> +
>> +	if (dump->idx < dump->cb->args[2])
>> +		goto skip;
>> +
>> +	nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
>> +			sizeof(*ndm), NLM_F_MULTI);
>> +	if (!nlh)
>> +		return -EMSGSIZE;
>> +
>> +	ndm = nlmsg_data(nlh);
>> +	ndm->ndm_family  = AF_BRIDGE;
>> +	ndm->ndm_pad1    = 0;
>> +	ndm->ndm_pad2    = 0;
>> +	ndm->ndm_flags   = NTF_SELF;
>> +	ndm->ndm_type    = 0;
>> +	ndm->ndm_ifindex = dump->dev->ifindex;
>> +	ndm->ndm_state   = ndm_state;
> 
> So we can simply scope this here:
> 
>         ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
> 
>> +
>> +	if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
>> +		goto nla_put_failure;
>> +
>> +	if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
>> +		goto nla_put_failure;
>> +
>> +	nlmsg_end(dump->skb, nlh);
>> +
>> +skip:
>> +	dump->idx++;
>> +	return 0;
>> +
>> +nla_put_failure:
>> +	nlmsg_cancel(dump->skb, nlh);
>> +	return -EMSGSIZE;
>> +}
> 
> Other than that, LGTM.
> 
> 
> Thanks,
> 
>         Vivien
>