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

[Chad Miller]

Public bug reported:

update-grub runs /usr/sbin/grub-probe

/usr/sbin/grub-probe runs ["zpool", "status", poolname]

zpool responds with device names as used at pool creation time. Often,
this is /dev/disk/by-id/... names.

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'.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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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 grub2 package in Ubuntu:
  New

Bug description:
  update-grub runs /usr/sbin/grub-probe

  /usr/sbin/grub-probe runs ["zpool", "status", poolname]

  zpool responds with device names as used at pool creation time. Often,
  this is /dev/disk/by-id/... names.

  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'.

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