linux-kernel - Re: [PATCH v2] ceph: add ceph.caps vxattr

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Date:   Tue, 24 Nov 2020 08:09:12 -0500
From:   Jeff Layton <jlayton@...nel.org>
To:     Luis Henriques <lhenriques@...e.de>,
        Ilya Dryomov <idryomov@...il.com>
Cc:     ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ceph: add ceph.caps vxattr

On Mon, 2020-11-23 at 17:38 +0000, Luis Henriques wrote:
> Add a new vxattr that allows userspace to list the caps for a specific
> directory or file.
> 
> Signed-off-by: Luis Henriques <lhenriques@...e.de>
> ---
> Hi!
> 
> Here's a version that also shows the caps in hexadecimal format, as
> suggested by Jeff.  IMO the parenthesis and the '0x' prefix help the
> readability, but they may make it a bit harder for scripts to parsing the
> output.  I'm OK dropping those.
> 
> Cheers,

Looks good, merged into "testing".

I did make a slight change to the format -- instead of putting the hex
value in parenthesis, I separated the two fields with a /, which I think
should make things easier for scripts to parse.

You should be able to do something like this to get at the hex value for
testing:

    $ getfattr -n ceph.caps foo | cut -d / -f2

Let me know if you see issues with that and we can revisit the format.

Thanks!
-- 
Jeff Layton <jlayton@...nel.org>