linux-kernel - Re: [PATCH v2 01/14] staging: lustre: llite: Remove filtering of seclabel xattr

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Date:   Sun, 20 Aug 2017 03:53:39 +0100 (BST)
From:   James Simmons <jsimmons@...radead.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc:     devel@...verdev.osuosl.org,
        Andreas Dilger <andreas.dilger@...el.com>,
        Oleg Drokin <oleg.drokin@...el.com>,
        Robin Humble <plaguedbypenguins@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lustre Development List <lustre-devel@...ts.lustre.org>
Subject: Re: [PATCH v2 01/14] staging: lustre: llite: Remove filtering of
 seclabel xattr


> On Mon, Aug 14, 2017 at 12:20:51PM -0400, James Simmons wrote:
> > From: Robin Humble <plaguedbypenguins@...il.com>
> > 
> > The security.capability xattr is used to implement File
> > Capabilities in recent Linux versions. Capabilities are a
> > fine grained approach to granting executables elevated
> > privileges. eg. /bin/ping can have capabilities
> > cap_net_admin, cap_net_raw+ep instead of being setuid root.
> > 
> > This xattr has long been filtered out by llite, initially for
> > stability reasons (b15587), and later over performance
> > concerns as this xattr is read for every file with eg.
> > 'ls --color'. Since LU-2869 xattr's are cached on clients,
> > alleviating most performance concerns.
> > 
> > Removing llite's filtering of the security.capability xattr
> > enables using Lustre as a root filesystem, which is used on
> > some large clusters.
> > 
> > Signed-off-by: Robin Humble <plaguedbypenguins@...il.com>
> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-9562
> > Reviewed-on: https://review.whamcloud.com/27292
> > Reviewed-by: John L. Hammond <john.hammond@...el.com>
> > Reviewed-by: Sebastien Buisson <sbuisson@....com>
> > Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
> > Signed-off-by: James Simmons <jsimmons@...radead.org>
> > ---
> > Changelog:
> > 
> > v1) Initial submit with wrong patch attached.
> > v2) Proper patch this time.
> 
> I don't see a v1 patch anywhere...

Its the patch I asked you to drop earlier. Same commit message but I mixed
up the patch with another patch.

> Anyway, when you do this, please make your subject such that I can sort
> the emails properly and they show up in the correct order, so put the
> "v2" after the patch number like this:
> 
>    Subject: [PATCH 01/14 v2] staging: lustre: llite: Remove filtering of
> 
> I think git does that correctly for you automatically if you use it...

Will do.