Messages in this thread | | | Date | Tue, 21 Jan 2014 15:17:08 +0100 | Date | Tue, 21 Jan 2014 15:17:08 +0100 | From | Volker Lendecke <> | Subject | Re: [PATCH v7 0/7] Add O_DENY* support for VFS and CIFS/NFS |
| |
On Tue, Jan 21, 2014 at 05:31:39PM +0400, Pavel Shilovsky wrote: > It's not possible with the current API to do it through open syscall. > Another possibility is to look at /proc/locks. But I think we really > need O_DELETE flag that will force a file to be removed on close - we > will be able to do O_DENYDELETE checks atomically.
I don't depend on this at open time. I can do it later with some syscall, that's fine. I just want to find a way to do it correctly. The problem is -- you can't "try" an unlink. So we have to probe whether we can unlink. And opening for O_DENYDELETE by no means says we *will* unlink. We just have to keep the option to do it exclusively.
With best regards,
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@sernet.de -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |