Re: [PATCH v7 0/7] Add O_DENY* support for VFS and CIFS/NFS

From: Volker Lendecke
Date: Mon Jan 20 2014 - 03:46:16 EST


Hi!

On Fri, Jan 17, 2014 at 02:07:05PM +0400, Pavel Shilovsky wrote:
> If O_DENYDELETE flag is specified and the open succeded,
> any further unlink operation will fail with -ESHAREDENIED
> untill this open is closed. Now this flag is processed by
> VFS and CIFS filesystem. NFS returns -EINVAL for opens
> with this flag.

This looks really, really good, thanks!

One question: If Samba wants to open a file for delete
access, there's no corresponding flag in the open
permissions. There can be the case where Samba wants to open
*just* for future unlink, no read or write access required.
Is there a way to achieve this atomically correct?

Thanks,

Volker

--
SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen
http://www.sernet.de, mailto:kontakt@xxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/