On Fri, 07 Oct 2016 at 10:15:55 +0200, Paride Legovini wrote: > $(canonical_device "$device" --no-simplify) resolves the UUID entry to > /dev/sda2, then btrfs is asked to show the list of devices relevant for > the filesystem contained in that device. (btrfs filesystems can span on > several devices, like zfs.) This returns again: /dev/sda2. Then the > canonical_device for /dev/sda2 is looked for, but this fails, as > canonical_device() wants an UUID or LABEL in order to fully work, unless > --no-simplify is given.
Right, thanks for looking that up. > Perhaps we should add a --no-simplify to that loop? Hmm but we'll still want unambiguous crypttab(5) lookups. It's unfortunate that `btrfs filesystem` lists /dev/sda2 while the FS actually uses device UUIDs internally. I think we need to call blkid(8) to pass the device's UUID to canonical_device(). I should also point out that this doesn't happen for encrypted root FS, as `btrfs filesystem` then lists /dev/mapper/…. Hence IMHO the proper fix is to split initramfs integration into a separate package (cf. #783297); then if you don't need cryptsetup initramfs integration you could just uninstall ‘cryptsetup-initramfs’. -- Guilhem.
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