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Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type" breaking Docker

From Al Viro <viro@ZenIV.linux.org.uk>
Newsgroups linux.kernel
Subject Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type" breaking Docker
Date 2016-05-17 08:30 +0200
Message-ID <rzGFX-XB-3@gated-at.bofh.it> (permalink)
References <rzkvM-3ws-9@gated-at.bofh.it> <rzqrv-7tO-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, May 16, 2016 at 09:07:27AM -0400, Vivek Goyal wrote:
> So it became clear that we need a check at mount time to make sure
> d_type is supported otherwise error out. This will require users to
> do mkfs.xfs with ftype=1 to make progress.
> 
> I think new defaults for mkfs.xfs are such that ftype=1 is set. I am
> not sure which version that change was made in.

Dumb question - can we end up with empty workdir at that point?  Because
if we do, the check would appear to return a false negative, no matter
what fs supports...

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45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type" breaking Docker  Daniel Axtens <dja@axtens.net> - 2016-05-16 08:50 +0200
  Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type"  breaking Docker Vivek Goyal <vgoyal@redhat.com> - 2016-05-16 15:10 +0200
    Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type"  breaking Docker Al Viro <viro@ZenIV.linux.org.uk> - 2016-05-17 08:30 +0200
      Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type"  breaking Docker Miklos Szeredi <mszeredi@redhat.com> - 2016-05-17 10:20 +0200
        Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type"  breaking Docker Vivek Goyal <vgoyal@redhat.com> - 2016-05-17 14:20 +0200
          Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type"  breaking Docker Miklos Szeredi <miklos@szeredi.hu> - 2016-05-17 16:30 +0200
          Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type" breaking Docker Daniel Axtens <dja@axtens.net> - 2016-05-18 05:40 +0200
    Re: 45aebeaf4f67 "ovl: Ensure upper filesystem supports d_type" breaking Docker Daniel Axtens <dja@axtens.net> - 2016-05-18 00:40 +0200

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