Re: [PATCH v8 0/9] Overlayfs: constant st_ino/d_ino for non-samefs

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On Thu, Mar 22, 2018 at 4:07 PM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
> On Thu, Mar 22, 2018 at 4:19 PM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
>> On Sat, Mar 17, 2018 at 9:29 AM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
>>> On Wed, Nov 8, 2017 at 12:53 PM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
>>>> On Tue, Nov 7, 2017 at 5:58 PM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
>>> [...]
>>>
>>>> The -oxino patches are interesting, but maybe we should leave them
>>>> brewing for another cycle.  Do you agree?
>>>>
>>>
>>> Miklos,
>>>
>>> FYI, I pushed ovl-xino branch that is rebased on v4.16-rc5 and on top
>>> of a few fixes in branch ovl-fixes:
>>> * 5668064a61f6 - ovl: set i_ino to the value of st_ino for NFS export
>>> * 579515ad5c75 - ovl: opaque xattr should overrule redirect xattr
>>> * 0161362aeab7 - ovl: fix lookup with middle layer opaque dir and
>>> absolute path redirects
>>
>> I'm a bit confused about this last one.  It's in Vivek's lookup fixes
>> series as well but in a slightly different form.  Which one should I
>> be looking at?
>>
>
> Vivek's patch is the later version (so v2).
> There are 2 differences between v1 and v2:
> 1. Vivek's commit message is more elaborate, so should take it.
> 2. Vivek's patch sets only d->stop and not d->opaque
> This difference is purely semantic, because d->opaque is
> ignored in ovl_lookup() for anything but the upper layer.
>
> I am fine with the semantic change, but wasn't sure if you
> had other meaning in mind w.r.t d->opaque and metadata
> going forward.

I think clearing opaque it is the correct thing to do even if it
doesn't have any effect.

Thanks,
Miklos
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