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

[Dave Kleikamp]

On 6/28/23 8:46AM, Dr. David Alan Gilbert wrote:
> * Dr. David Alan Gilbert (dave@xxxxxxxxxxx) wrote:
> > * Tom Talpey (tom@xxxxxxxxxx) wrote:
> > > On 6/27/2023 9:14 PM, linux@xxxxxxxxxxx wrote:
> > > > From: "Dr. David Alan Gilbert" <linux@xxxxxxxxxxx>
> > > >
> > > > 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.

A bit off topic, but a question for Steve.

Is there a need for separate modules under fs/smb/common/? Or could the 
makefile do something like:

obj-$(CONFIG_SMBFS) += smb_common.o

smb_common-y := cifs.arc4.o cifs_md4.o smb_unicode.o

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   |_______/