linux-kernel - Re: [Jfs-discussion] [PATCH 0/3] dedupe smb unicode files

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Date:   Wed, 28 Jun 2023 14:39:16 +0000
From:   "Dr. David Alan Gilbert" <linux@...blig.org>
To:     Dave Kleikamp <dave.kleikamp@...cle.com>, krisman@...labora.com
Cc:     Tom Talpey <tom@...pey.com>, sfrench@...ba.org,
        linux-cifs@...r.kernel.org, jfs-discussion@...ts.sourceforge.net,
        linkinjeon@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [Jfs-discussion] [PATCH 0/3] dedupe smb unicode files

* Dave Kleikamp (dave.kleikamp@...cle.com) wrote:
> On 6/28/23 8:46AM, Dr. David Alan Gilbert wrote:
> > * Dr. David Alan Gilbert (dave@...blig.org) wrote:
> > > * Tom Talpey (tom@...pey.com) wrote:
> > > > On 6/27/2023 9:14 PM, linux@...blig.org wrote:
> > > > > From: "Dr. David Alan Gilbert" <linux@...blig.org>
> > > > > 
> > > > > The smb client and server code have (mostly) duplicated code
> > > > > for unicode manipulation, in particular upper case handling.
> > > > > 
> > > > > Flatten this lot into shared code.
> > > > > 
> > > > > There's some code that's slightly different between the two, and
> > > > > I've not attempted to share that - this should be strictly a no
> > > > > behaviour change set.
> > > > > 
> > > > > I'd love to also boil out the same code from fs/jfs/ - but that's
> > > > > a thought for another time (and harder since there's no good test
> > > > > for it).
> > > > > 
> > > > > Lightly tested with a module and a monolithic build, and just mounting
> > > > > itself.
> > > > > 
> > > > > This dupe was found using PMD:
> > > > >     https://pmd.github.io/pmd/pmd_userdocs_cpd.html
> > > > > 
> > > > > Dave
> > > > > 
> > > > > Dr. David Alan Gilbert (3):
> > > > >     fs/smb: Remove unicode 'lower' tables
> > > > >     fs/smb: Swing unicode common code from server->common
> > > > >     fs/smb/client: Use common code in client
> > > > > 
> > > > >    fs/smb/client/cifs_unicode.c                  |   1 -
> > > > >    fs/smb/client/cifs_unicode.h                  | 313 +-----------------
> > > > >    fs/smb/client/cifs_uniupr.h                   | 239 -------------
> > > > >    fs/smb/common/Makefile                        |   1 +
> > > > >    .../uniupr.h => common/cifs_unicode_common.c} | 156 +--------
> > > > >    fs/smb/common/cifs_unicode_common.h           | 279 ++++++++++++++++
> > > > 
> > > > So far so good, but please drop the "cifs_" prefix from this new file's
> > > > name, since its contents apply to later smb dialects as well.
> > > 
> > > Sure.
> > 
> > Actually, would you be ok with smb_unicode_common ?  The reason is that
> > you end up with a module named unicode_common  that sounds too generic.
> 
> I'd suggest make it generic and move it to fs/nls/. I'd run it by the nls
> maintainers, but I don't think there are any.

Steve & Tom - would you be OK with that?

(Copying in Gabriel Bertazi, owner of fs/unicode; although this isn't
utf-8)

Dave

> Shaggy
> 
> > 
> > Dave
> > 
> > > Dave
> > > 
> > > > Tom.
> > > > 
> > > > >    fs/smb/server/unicode.c                       |   1 -
> > > > >    fs/smb/server/unicode.h                       | 301 +----------------
> > > > >    8 files changed, 298 insertions(+), 993 deletions(-)
> > > > >    delete mode 100644 fs/smb/client/cifs_uniupr.h
> > > > >    rename fs/smb/{server/uniupr.h => common/cifs_unicode_common.c} (50%)
> > > > >    create mode 100644 fs/smb/common/cifs_unicode_common.h
> > > > > 
> > > -- 
> > >   -----Open up your eyes, open up your mind, open up your code -------
> > > / Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \
> > > \        dave @ treblig.org |                               | In Hex /
> > >   \ _________________________|_____ http://www.treblig.org   |_______/
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/