I thought all lowerdirs must be read-only, and the first one in the stack will win. Even if there are same ones down the stack it shouldn't matter. But I guess needs testing.
I wouldn't want to use random, as that will eat entropy on early boot of Ubuntu Core systems. Do we need a separate upstream issue to create uuid in the squashfs Superblock? On Wed, 6 Nov 2019, 21:21 Adam Conrad, <adcon...@0c3.net> wrote: > While there may be arguments for synthesizing UUIDs in various fs > drivers, or creating them in the first place in fs-creation tools, I > agree that if overlayfs has a hard dependency on UUIDs for uniquely > identifying layers, it needs to fill in the gaps where the previous > tools/drivers failed to provide. > > So, yeah, I think Colin's on the right track here with making overlayfs > itself fix its own use-case, which will cover any future filesystem/tool > that otherwise fails to UUID itself. > > My only review of the above is that you might want to mix a monotonic or > random seed in with your superblock when generating your fake UUIDs, in > case someone does something like stacking multiple empties on top of > each other, or some other madness where you effectively have the same > superblock more than once at the RO level, but need to identify them as > different. > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1824407 > > Title: > remount of multilower moved pivoted-root overlayfs root, results in > I/O errors on some modified files > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824407/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1824407 Title: remount of multilower moved pivoted-root overlayfs root, results in I/O errors on some modified files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824407/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
