Re: xfstest 531 and unlink of open file

[ronnie sahlberg <ronniesahlberg@gmail.com>]

On Mon, Jun 24, 2019 at 1:23 PM Steve French <smfrench@gmail.com> wrote:
>
> Xioli created a fairly simple unlink test failure reproducer loosely
> related to xfstest 531 (see
> https://bugzilla.kernel.org/show_bug.cgi?id=203271) which unlinks an
> open file then tries to create a file with the same name before
> closing the first file (which fails over SMB3/SMB3.11 mounts with
> STATUS_DELETE_PENDING).
>
> Presumably we could work around this by a "silly-rename" trick.
> During delete we set delete on close for the file, then close it but
> presumably we could check first if the file is open by another local
> process and if so try to rename it?
>
> Ideas?

The test is to check "can you unlink and recreate a file while someone
(else) is holding it open?"

I don't think you can rename() a file while other folks have it open :-(
This is likely a place where NTFS is too different from Posix that we
can't get full 100% posix semantics.

>
> --
> Thanks,
>
> Steve