zvol_id throws ioctl_get_msg failed:Inappropriate ioctl for device

The reason for this failure is that the BLKZNAME ioctl is different, zfs 0.6.x has a 255 char name where as 0.7.0 has a 256 char name.

There are test packages ready for testing in a PPA, do you mind trying these out using:

sudo add-apt-repository ppa:colin-king/zfs-lp1763067
sudo apt-get update
sudo apt-get dist-upgrade

And let me know if this fixes the issue.

That works.

Thanks for testing. I'll try and get that in after the current round of SRU's land.

Hello Clint, or anyone else affected,

Accepted zfs-linux into artful-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/zfs-linux/0.6.5.11-1ubuntu3.4 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-artful to verification-done-artful. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-artful. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

I approved it for artful before I actually checked if it's in bionic. Seeing that we're in Final Freeze now, I guess it's not likely for us to get this accepted in bionic, but as soon as we open-up for SRUs - please be sure to get it uploaded to bionic/devel as well.

I'll conditionally approve xenial as well, but please remember we probably won't publish it into -updates before we also have it in bionic.

Hello Clint, or anyone else affected,

Accepted zfs-linux into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/zfs-linux/0.6.5.6-0ubuntu21 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Just to note, this is a compat fix for older versions of the user space tools to work with newer ZFS 0.7.x, so the fix is not required in Bionic.

Tested on Xenial with HWE kernel 4.15.0-15 (#16~16.04.1), works fine with this fix.

Tested on Artful with 4.15.0-20, works fine now with this fix too.

Note: this does not need fixing for Bionic as the ZFS 0.7.x userspace tools work fine with the 4.15 bionic kernel.

This bug was fixed in the package zfs-linux - 0.6.5.11-1ubuntu3.4

---------------
zfs-linux (0.6.5.11-1ubuntu3.4) artful; urgency=medium

  * Add ZFS 0.7.0 compat fix for zvol_id (LP: #1763067)
    The BLKZNAME ioctl msg size has changed in ZFS 0.7.0 so
    add forwards compat handling for this ioctl by retrying
    with this newer msg size if the first call fails

 -- Colin Ian King <email address hidden> Thu, 12 Apr 2018 11:14:23 +0100

The verification of the Stable Release Update for zfs-linux has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package zfs-linux - 0.6.5.6-0ubuntu21

---------------
zfs-linux (0.6.5.6-0ubuntu21) xenial; urgency=medium

  * Add ZFS 0.7.0 compat fix for zvol_id (LP: #1763067)
    The BLKZNAME ioctl msg size has changed in ZFS 0.7.0 so
    add forwards compat handling for this ioctl by retrying
    with this newer msg size if the first call fails

 -- Colin Ian King <email address hidden> Thu, 12 Apr 2018 11:14:23 +0100