linux-ext4 - Re: [PATCH V2] ext4: don't complain about incorrect features when probing

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Message-ID: <20180322160017.GL2852@thunk.org>
Date:   Thu, 22 Mar 2018 12:00:17 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Eric Sandeen <sandeen@...hat.com>
Cc:     "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
Subject: Re: [PATCH V2] ext4: don't complain about incorrect features when
 probing

On Fri, Mar 02, 2018 at 10:51:28AM -0600, Eric Sandeen wrote:
> 
> 
> If mount is auto-probing for filesystem type, it will try various
> filesystems in order, with the MS_SILENT flag set.  We get
> that flag as the silent arg to ext4_fill_super.
> 
> If we're probing (silent==1) then don't complain about feature
> incompatibilities that are found if it looks like it's actually
> a different valid extN type - failed probes should be silent
> in this case.
> 
> If the on-disk features are unknown even to ext4, then complain.
> 
> Reported-by: Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>

Thanks, applied.

						- Ted