On Fri, Apr 28, 2017 at 06:49:45AM +0100, Andy Whitcroft wrote: > On Thu, Apr 27, 2017 at 03:30:35PM -0500, Eric Sandeen wrote: > > > It'd be trivial to make that a vfs function and set a flag on the vfs super > > if the UUID is not unique. Would that be worthwhile? I can send a patch > > if so. > > This only tells you that the UUID it has is unique now. As you are > contemplating storing them in the FS they have to be unique in space > _and_ time. No check you can do now can tell you if the UUID is unique > for all time. Right ? Well, since we're talking about all time: "probably" :P That said, Eric was talking about a refactoring of one of XFS's mount time checks that errors out if there's already a mounted fs with the same uuid. We use it to avoid catastrophic mounting of the same fs from multiple (misconfigured) multipaths/snapshots/volumes/whatever on the same machine. Not sure if that's useful for Amir's case. --D > > -apw > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
