linux-kernel - Re: [PATCH v2 0/4] dedupe smb unicode files

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Date:   Wed, 12 Jul 2023 23:17:46 +0000
From:   "Dr. David Alan Gilbert" <dave@...blig.org>
To:     sfrench@...ba.org, linkinjeon@...nel.org, tom@...pey.com,
        dave.kleikamp@...cle.com, shaggy@...nel.org,
        linux-cifs@...r.kernel.org
Cc:     krisman@...labora.com, jfs-discussion@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/4] dedupe smb unicode files

* linux@...blig.org (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.

Gentle two week ping on this please.

Dave

(Apologies to the 3 of you who already got a copy of this ping,
recent due to a missing header ',' )

> 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.
> 
> In addition, the same tables and code are shared in jfs, however
> there's very little testing available for the unicode in there,
> so just share the raw data tables.
> 
> I suspect there's more UCS-2 code that can be shared, in the NLS code
> and in the UCS-2 code used by the EFI interfaces.
> 
> 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
> 
> Version 2
>   Moved the shared code to fs/nls after v1 feedback.
>   Renamed shared tables from Smb to Nls prefix
>   Move UniStrcat as well
>   Share the JFS tables
> 
> Dr. David Alan Gilbert (4):
>   fs/smb: Remove unicode 'lower' tables
>   fs/smb: Swing unicode common code from smb->NLS
>   fs/smb/client: Use common code in client
>   fs/jfs: Use common ucs2 upper case table
> 
>  fs/jfs/Kconfig               |   1 +
>  fs/jfs/Makefile              |   2 +-
>  fs/jfs/jfs_unicode.h         |  17 +-
>  fs/jfs/jfs_uniupr.c          | 121 -------------
>  fs/nls/Kconfig               |   8 +
>  fs/nls/Makefile              |   1 +
>  fs/nls/nls_ucs2_data.h       |  15 ++
>  fs/nls/nls_ucs2_utils.c      | 144 +++++++++++++++
>  fs/nls/nls_ucs2_utils.h      | 285 ++++++++++++++++++++++++++++++
>  fs/smb/client/Kconfig        |   1 +
>  fs/smb/client/cifs_unicode.c |   1 -
>  fs/smb/client/cifs_unicode.h | 330 +----------------------------------
>  fs/smb/client/cifs_uniupr.h  | 239 -------------------------
>  fs/smb/server/Kconfig        |   1 +
>  fs/smb/server/unicode.c      |   1 -
>  fs/smb/server/unicode.h      | 325 +---------------------------------
>  fs/smb/server/uniupr.h       | 268 ----------------------------
>  17 files changed, 467 insertions(+), 1293 deletions(-)
>  delete mode 100644 fs/jfs/jfs_uniupr.c
>  create mode 100644 fs/nls/nls_ucs2_data.h
>  create mode 100644 fs/nls/nls_ucs2_utils.c
>  create mode 100644 fs/nls/nls_ucs2_utils.h
>  delete mode 100644 fs/smb/client/cifs_uniupr.h
>  delete mode 100644 fs/smb/server/uniupr.h
> 
> -- 
> 2.41.0
> 
-- 
 -----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   |_______/