Re: [PATCH] xfs: publish UUID in struct super_block

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On Fri, Apr 28, 2017 at 8:18 AM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
> On Fri, Apr 28, 2017 at 8:56 AM, Darrick J. Wong
> <darrick.wong@xxxxxxxxxx> wrote:
>> 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 ?

I don't understand this fuss about checking if a unique identifier is
unique.  It obviously is, if not don't call it uuid, call it nuuid.

Thanks,
Miklos
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