netdev - Re: [PATCH net v5] failover: allow name change on IFF

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d034f2f1-592c-7ce3-6bb3-05c53d195678@intel.com>
Date:   Tue, 2 Apr 2019 22:22:18 -0700
From:   "Samudrala, Sridhar" <sridhar.samudrala@...el.com>
To:     Stephen Hemminger <stephen@...workplumber.org>,
        si-wei liu <si-wei.liu@...cle.com>
Cc:     mst@...hat.com, davem@...emloft.net, kubakici@...pl,
        alexander.duyck@...il.com, jiri@...nulli.us,
        netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        liran.alon@...cle.com, boris.ostrovsky@...cle.com,
        vijay.balakrishna@...cle.com
Subject: Re: [PATCH net v5] failover: allow name change on IFF_UP slave
 interfaces



On 4/2/2019 8:14 PM, Stephen Hemminger wrote:
> On Tue, 2 Apr 2019 15:23:29 -0700
> si-wei liu <si-wei.liu@...cle.com> wrote:
> 
>> On 4/2/2019 2:53 PM, Stephen Hemminger wrote:
>>> On Mon,  1 Apr 2019 19:04:53 -0400
>>> Si-Wei Liu <si-wei.liu@...cle.com> wrote:
>>>   
>>>> +	if (dev->flags & IFF_UP &&
>>>> +	    likely(!(dev->priv_flags & IFF_FAILOVER_SLAVE)))
>>> Why is property limited to failover slave, it would make sense for netvsc
>>> as well. Why not make it a flag like live address change?
>> Well, netvsc today is still taking the delayed approach meaning that it
>> is incompatible yet with this live name change flag if need be. ;-)
>>
>> I thought Sridhar did not like to introduce an additional
>> IFF_SLAVE_RENAME_OK flag given that failover slave is the only consumer
>> for the time being. Even though I can get it back, patch is needed for
>> netvsc to remove the VF takeover delay IMHO.
>>
>> Sridhar, what do you think we revive the IFF_SLAVE_RENAME_OK flag which
>> allows netvsc to be used later on? Or maybe, IFF_LIVE_RENAME_OK for a
>> better name?
>>
>> -Siwei
> 
> I would name it IFF_LIVE_NAME_CHANGE to match IFF_LIVE_ADDR_CHANGE
> there is no reason its use should be restricted to SLAVE devices.
>
Stephen,
May be you should consider moving netvsc to use the net_failover driver now?