Re: [RFC PATCH] ovl:fix rmdir problem on impure dir

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On 2017/6/16 17:57, Miklos Szeredi wrote:
> On Fri, Jun 16, 2017 at 11:50 AM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
>> On Fri, Jun 16, 2017 at 10:55 AM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
>>> On Fri, Jun 16, 2017 at 10:39 AM, zhangyi (F) <yi.zhang@xxxxxxxxxx> wrote:
>>>> On 2017/6/16 14:02, Amir Goldstein Wrote:
>>>>> On Fri, Jun 16, 2017 at 6:55 AM, zhangyi (F) <yi.zhang@xxxxxxxxxx> wrote:
>>>>>> Hi All:
>>>>>>
>>>>>> I found another problem about impure upper dir which have left
>>>>>> whiteout files. If an "impure && not merged" upper dir have
>>>>>> left whiteout files(last mount created), ovl cannot clear this
>>>>>> dir when we removing it, which may lead to rmdir fail or temp
>>>>>> file left in workdir.
>>
>> Thanks for the report and patch.
>>
>> I think the unlink failures are indicative of a bigger problem,
>> though: we optimize directory reading (and empty checking) based on
>> the MERGE flag.  This results in the whiteout being returned in the
>> directory listing in your test case.
>>
>> Fortunately we now have a way to identify directories that may contain
>> whiteouts: the "overlay.origin" xattr.  So I think we should switch to
>> using that instead of the MERGE flag for deciding whether we can use
>              ^^^^^^^^^
> That should be "in addition to" not "instead of".
> 

I think these have been done by Amir in his patch "ovl: consistent st_ino/d_ino" on June 1.  :)


Thanks,

ZhangYi

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