linux-kernel - Re: Issues with FIEMAP, xfstests, Samba, ksmbd and CIFS

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Message-ID: <449658.1701866309@warthog.procyon.org.uk>
Date:   Wed, 06 Dec 2023 12:38:29 +0000
From:   David Howells <dhowells@...hat.com>
To:     fstests@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-cifs@...r.kernel.org
Cc:     dhowells@...hat.com, Steve French <sfrench@...ba.org>,
        Paulo Alcantara <pc@...guebit.com>,
        Dave Chinner <david@...morbit.com>,
        Filipe Manana <fdmanana@...e.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Issues with FIEMAP, xfstests, Samba, ksmbd and CIFS

David Howells <dhowells@...hat.com> wrote:

> So:
> 
>  - Should Samba and ksmbd be using FALLOC_FL_ZERO_RANGE rather than
>    PUNCH_HOLE?
> 
>  - Should Samba and ksmbd be using FIEMAP rather than SEEK_DATA/HOLE?

 - Should Samba and ksmbd report 'unwritten' extents as being allocated?

>  - Should xfstests be less exacting in its FIEMAP analysis - or should this be
>    skipped for cifs?  I don't want to skip generic/009 as it checks some
>    corner cases that need testing, but it may not be possible to make the
>    exact extent matching work.