On Tue, May 02, 2017 at 05:08:26PM +0200, Miklos Szeredi wrote: > Two separate issues: > > a) is s_uuid unique across all currently mounted filesystems on this system > b) is s_uuid unique for all different filesystems that have been > mounted at one time on some system > > We can check (a) but not (b). But failing (b) could have equally bad > consequences as failing (a). While (b) is harmful it's not anywhere near as harmful as (a). And while we can trivially protect against (a) protecting against the full scope of (b) (e.g. including reboots) would be very hard.
