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From:   linux@treblig.org
To:     smfrench@gmail.com, dave.kleikamp@oracle.com, tom@talpey.com,
        pc@manguebit.com
Cc:     linkinjeon@kernel.org, linux-cifs@vger.kernel.org,
        jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org,
        krisman@collabora.com, "Dr. David Alan Gilbert" <linux@treblig.org>
Subject: [PATCH v4 0/4] dedupe smb unicode files
Date:   Sun, 13 Aug 2023 01:53:40 +0100
Message-ID: <20230813005344.112955-1-linux@treblig.org>
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From: "Dr. David Alan Gilbert" <linux@treblig.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.

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 4
  Put SPDX tag back to the way the tools like it, thanks to
    Paulo Alcantara for explaining

Version 3
  History comments simplification (Feedback from Tom Talpey)

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 +
 .../server/uniupr.h => nls/nls_ucs2_utils.c}  | 156 +--------
 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 +----------------
 16 files changed, 340 insertions(+), 1164 deletions(-)
 delete mode 100644 fs/jfs/jfs_uniupr.c
 create mode 100644 fs/nls/nls_ucs2_data.h
 rename fs/{smb/server/uniupr.h => nls/nls_ucs2_utils.c} (50%)
 create mode 100644 fs/nls/nls_ucs2_utils.h
 delete mode 100644 fs/smb/client/cifs_uniupr.h

-- 
2.41.0