linux-kernel - Re: [Patch net-next v3 9/9] selinux: use generic union inet

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Date:	Tue, 20 Aug 2013 07:28:15 -0700
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	Cong Wang <amwang@...hat.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	james.l.morris@...cle.com, sds@...ho.nsa.gov,
	eparis@...isplace.org, pmoore@...hat.com,
	linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [Patch net-next v3 9/9] selinux: use generic union inet_addr

On 8/20/2013 6:01 AM, Cong Wang wrote:
> On Mon, 2013-08-19 at 14:42 -0700, Casey Schaufler wrote:
>> Well, they certainly don't appear to add any value on their own.
>> I also generally oppose doing clever things with data structures. 
> If you want to implement same thing for 5+ times,

Those 5+ implementations are already there, and already work.
A 6th implementation to replace known working code is just churn
unless it provides some additional value. Making the code "better"
does not itself add value. 

>  yes, it has no value
> for you. Enjoy the following code in current tree:
>
> union nf_inet_addr;
> union sctp_addr;
> union vxlan_addr; (in my VXLAN IPv6 patches, search email archives)
> struct br_mdb_entry::addr;
> union inet_addr; (in netpoll.h)
>
> And may I tell you the last three are all from me? ;-)

I do use and enjoy all of these implementations! Thank you
for the fine implementations. In the end, if you're maintaining
the code it's your call. I question change that does not have
an obvious purpose because statistically every 10th change has
a bug.

Now that I know what the change is for I am fine with it. I
like seeing reasons up front.

>
>
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