Tested on Artful with 4.15.0-20, works fine now with this fix too.
** Description changed:
== SRU Justification [XENIAL][ARTFUL] ==
Symlinks in /dev/zvol are not because /lib/udev/zvol_id exits with
ioctl_get_msg failed:Inappropriate ioctl for device. The core reason is
that the BLKZNAME with non-HWE userspace zfsutils is 1 char different is
size than the HWE kernel drivers.
== Fix ==
Change the userland zvol_id tool to use the V0.6.x ZFS_MAXNAMELEN size
and if that fails with ENOTTY retry with the V0.07.0 ZFS_MAXNAMELEN size
as a fallback compatibility call.
== Regression Potential ==
Very small, this changes zvol_id and keeps the original functionality as
well as adding V7 ZFS functionality as a fallback. At worse, zvol_id
will not work, but that's the same as the current broken state.
== Testing ==
create a volume, e.g. zfs create -V 8M ${POOL}/testvol
- run /lib/udev/vol_id on /dev/zd0 on Xenial with a 4.15 Xenial HWE
+ run /lib/udev/zvol_id on /dev/zd0 on Xenial with a 4.15 Xenial HWE
kernel. Without the fix one gets an ENOTTY errno failure. With the fix
zvol_id returns the zvol id and symlinks in /dev/zvol work.
---
Symlinks in /dev/zvol are not created because /lib/udev/zvol_id crashes
with ioctl_get_msg failed:Inappropriate ioctl for device.
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Running linux-generic-hwe-16.04-edge
4.15.0-13-generic
zfsutils-linux 0.6.5.6-0ubuntu19
The version of zvol_id in zfsutils-linux_0.7.5-1ubuntu14_amd64 works
without error.
** Tags added: verification-done-artful
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https://bugs.launchpad.net/bugs/1763067
Title:
zvol_id throws ioctl_get_msg failed:Inappropriate ioctl for device
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