Re: [PATCH] mount.cifs: remove support for "complex" usernames from mount.cifs

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On Fri, 4 Jan 2013 14:09:00 -0600
Steve French <smfrench@xxxxxxxxx> wrote:

> ---------- Forwarded message ----------
> From: Steve French <smfrench@xxxxxxxxx>
> Date: Fri, Jan 4, 2013 at 2:04 PM
> Subject: Re: [PATCH] mount.cifs: remove support for "complex"
> usernames from mount.cifs
> To: Scott Lovenberg <scott.lovenberg@xxxxxxxxx>
> Cc: linux-cifs@xxxxxxxxxxxxxxx, Jeff Layton <jlayton@xxxxxxxxx>
> 
> 
> 
> On Jan 4, 2013 12:26 PM, "Scott Lovenberg" <scott.lovenberg@xxxxxxxxx> wrote:
> >
> > On Thu, Jan 3, 2013 at 3:04 PM, Steve French <smfrench@xxxxxxxxx> wrote:
> > > I am not as worried about code cleanliness as I am about losing function,
> > > especially as it is sometimes hard to figure out how many users would be
> > > affected by removing function.  I mildly prefer leaving the nfs syntax
> > > if it makes it easier for nfs users to use smb3, but we could make a stub
> > > mount helper that parses nfs syntax and simply calls mount.cifs if you
> > > prefer that approach - in any case I don't feel strongly about nfs syntax.
> >
> > I don't care much either way.  The reason behind removing it, IIRC,
> > was that it was an undocumented feature that lead to an ambiguous
> > parsing situation when you had NFS syntax with an IPv6 address as the
> > server portion of the string (ie
> > dead:beef::1:/shareNameWithColon:/prepath).  It was easier to remove
> > the undocumented feature than to support it for this use case.
> >
> > How does NFS syntax make things easier for SMB3?
> 
> UNC names may be unfamiliar for some NFS users. Smb3 has many
> performance advantages and other features that may eventually be of
> strong interest to some Linux  NFS users
> 
> 

Not exactly what I'd call a "killer use case"... ;)

If they want the features of SMB3, I doubt that UNC device strings will
be a great hurdle for them. This isn't NFS after all, so we shouldn't
go to great lengths to pretend that it is. OTOH, maintaining these
sorts of features is a burden. 

I'm all for bugfixes and features that offer a concrete benefit. I just
don't see one in this case.

-- 
Jeff Layton <jlayton@xxxxxxxxxx>
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