[Bug 1527727] [NEW] grub-probe for zfs assumes all devices prefix with /dev, ignoring /dev/disk/...

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You have been subscribed to a public bug by Chad Miller (cmiller):

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.

** Affects: grub
     Importance: Unknown
         Status: Unknown

** Affects: grub2 (Ubuntu)
     Importance: Medium
     Assignee: Chad Miller (cmiller)
         Status: Confirmed

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grub-probe for zfs assumes all devices prefix with /dev, ignoring /dev/disk/...
https://bugs.launchpad.net/bugs/1527727
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