On Tue, Jul 10, 2012 at 10:50:00AM -0700, Andy Grover wrote: > On 07/09/2012 11:02 PM, Christoph Hellwig wrote: > > On Mon, Jul 09, 2012 at 05:58:10PM -0700, Andy Grover wrote: > >> Other backstores open backing devices in exclusive mode, fileio should as > >> well. > > > > O_EXCL doesn't really provide an exclusion once the file is opened, it > > just means the caller has to create the file and it can't exist > > beforehand. > > > > I don't think that's the semantics fileio needs. > > OK, should userspace just check no other fileio storageobjects exist > with that same backing file? Not quite as clean since there still are > ways to get around that, but it would at least prevent user errors for > those using rtslib. You could try doing file locking - that would have to be from userspace through as there are no good APIs for it from kernelspace. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
