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

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On Tue, May 17, 2016 at 2:10 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote:

> Having said that, what happens when ovl_workdir_create() fails and we
> mount overlayfs read only. In that case I think we will conclude that
> underlying fs does not support d_type and mounting will fail.

Good point, I missed that.

> Any thoughts, on how to handle this failure path better?

Just skip the d_type test.  We won't create whiteouts that way (and
whiteouts would only have been created with a previous kernel that
didn't have this test, which I don't think is a very interesting
case).

Thanks,
Miklos
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