netdev - Re: [PATCH rfc 0/4] Introduce a new helper for parsing ipv[4|6]:port to socket address

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Message-Id: <EB281BA3-28DB-4DBA-BA3B-31A98BC0D44E@oracle.com>
Date:   Thu, 16 Feb 2017 12:59:24 -0500
From:   Chuck Lever <chuck.lever@...cle.com>
To:     Sagi Grimberg <sagi@...mberg.me>
Cc:     linux-nvme@...ts.infradead.org,
        List Linux RDMA Mailing <linux-rdma@...r.kernel.org>,
        target-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH rfc 0/4] Introduce a new helper for parsing ipv[4|6]:port to socket address


> On Feb 16, 2017, at 12:53 PM, Sagi Grimberg <sagi@...mberg.me> wrote:
> 
> Hey Chuck,
> 
>>> As a side-effect, this set adds ipv6 support for nvme over fabrics.
>>> I also converted iscsi target and plan to convert nfs/cifs next but
>>> wanted to get some feedback before doing that.
>> 
>> At least NFS/RDMA already supports IPv6. You might not need many
>> changes there, but I'll hold off on further comments.
> 
> Yea, I wanted to get all the rpc_pton/rpc_ntop (which handle both
> ipv4 and ipv6 with scopes) converted to use a common helper.

RPC is dealing with universal addresses, which are not quite the
same as IP presentation addresses. The port number is expressed
as:

  hi8.lo8

And universal IPv6 addresses don't have a mechanism for conveying
scope information.


--
Chuck Lever