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From:   linux@treblig.org
To:     sfrench@samba.org, linkinjeon@kernel.org, tom@talpey.com,
        linux-cifs@vger.kernel.org
Cc:     krisman@collabora.com, jfs-discussion@lists.sourceforge.net,
        linux-kernel@vger.kernel.org,
        "Dr. David Alan Gilbert" <linux@treblig.org>
Subject: [PATCH v2 0/4] dedupe smb unicode files
Date:   Thu, 29 Jun 2023 00:24:13 +0100
Message-ID: <20230628232417.120844-1-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 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