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From:   Miklos Szeredi <miklos@szeredi.hu>
Date:   Wed, 3 Feb 2021 16:03:06 +0100
Message-ID: <CAJfpegvV19DT+nQcW5OiLsGWjnp9-DoLAY16S60PewSLcKLTMA@mail.gmail.com>
Subject: Re: [PATCH 00/18] new API for FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR
To:     Matthew Wilcox <willy@infradead.org>
Cc:     Miklos Szeredi <mszeredi@redhat.com>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        Al Viro <viro@zeniv.linux.org.uk>,
        Andreas Dilger <adilger@dilger.ca>,
        Andreas Gruenbacher <agruenba@redhat.com>,
        Christoph Hellwig <hch@lst.de>,
        "Darrick J . Wong" <djwong@kernel.org>,
        Dave Kleikamp <shaggy@kernel.org>,
        David Sterba <dsterba@suse.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>, Jan Kara <jack@suse.cz>,
        Joel Becker <jlbec@evilplan.org>,
        Matthew Garrett <matthew.garrett@nebula.com>,
        Mike Marshall <hubcap@omnibond.com>,
        Richard Weinberger <richard@nod.at>,
        Ryusuke Konishi <konishi.ryusuke@gmail.com>,
        "Theodore Ts'o" <tytso@mit.edu>, Tyler Hicks <code@tyhicks.com>
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On Wed, Feb 3, 2021 at 3:56 PM Matthew Wilcox <willy@infradead.org> wrote:

> But let's talk specifics.  What does CIFS need to contact the server for?
> Could it be cached earlier?

I don't understand what CIFS is doing, and I don't really care.   This
is the sort of operation where adding a couple of network roundtrips
so that the client can obtain the credentials required to perform the
operation doesn't really matter.  We won't have thousands of chattr(1)
calls per second.

So I think the principle is more important than the details of the
current implementation.

And I'm saying that knowing that fixing up FUSE will be my
responsibility and it won't be trivial either.

Thanks,
Miklos