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Message #178703
[Bug 1527727] Re: grub-probe for zfs assumes all devices prefix with /dev, ignoring /dev/disk/...
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: zfs-linux (Ubuntu Xenial)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1527727
Title:
grub-probe for zfs assumes all devices prefix with /dev, ignoring
/dev/disk/...
Status in grub:
Unknown
Status in grub2 package in Ubuntu:
Fix Released
Status in grub2-signed package in Ubuntu:
Fix Released
Status in zfs-linux package in Ubuntu:
Fix Released
Status in grub2 source package in Xenial:
In Progress
Status in grub2-signed source package in Xenial:
In Progress
Status in zfs-linux source package in Xenial:
Confirmed
Bug description:
[Impact]
Installs over ZFS where a ZFS disk is expected to be used as a root device.
[Test case]
- Run update-grub on a system with a ZFS root filesystem.
[Regression Potential]
Installs relying on the current broken behavior to avoid listing other operating systems in grub menu may find that new entries are added.
---
update-grub runs /usr/sbin/grub-probe
Without libzfslinux support compiled in, /usr/sbin/grub-probe runs
["zpool", "status", poolname] to find out ZFS info.
zpool responds with device names as used at (I think!) pool creation
time. Often, this is /dev/disk/by-id/... names, without the path.
grub-probe then parses the output, and takes the names of devices, and
if they do not start with a "/", it prepends "/dev/".
It then tests the existence of the path name of the device. it fails.
grub-probe then returns something like
/usr/sbin/grub-probe: error: failed to get canonical path of `/dev
/ata-ST31000333AS_99999999-part1'.
The actual path is of course /dev/disk/by-
id/ST31000333AS_99999999-part1
It can prepend smarter than "/dev" or it can understand ZFS natively,
to fix the problem.
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