Public bug reported:

In the zvol_wait script there's the following lines of code:

filter_out_locked_zvols() {
    while read -r zvol; do
        if ! [ "$(zfs list -H -o keystatus rpool/export/vault/block "$zvol")" = 
"unavailable" ]; then
            echo "$zvol"
        fi
    done
}

It looks like "rpool/export/vault/block" is a copy/paste error of some
sorts...

1) sudo lsb_release -rd
No LSB modules are available.
Description:    Ubuntu 24.04.4 LTS
Release:        24.04

2)  apt-cache policy zfsutils-linux
zfsutils-linux: 
  Installed: 2.2.2-0ubuntu9.4
  Candidate: 2.2.2-0ubuntu9.4
  Version table:
 *** 2.2.2-0ubuntu9.4 500
        500 http://mirror.init7.net//ubuntu noble-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.2.2-0ubuntu9 500
        500 http://mirror.init7.net//ubuntu noble/main amd64 Packages

3) Not to check the non-existant pool 'rpool'

4)  sudo journalctl -b -g rpool|cut -d' ' -f6-|uniq -c
    162 cannot open 'rpool/export/vault/block': dataset does not exist

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: zfsutils-linux 2.2.2-0ubuntu9.4 [modified: sbin/zvol_wait]
ProcVersionSignature: Ubuntu 6.8.0-134.134-generic 6.8.12
Uname: Linux 6.8.0-134-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
Date: Sun Jul 12 12:55:46 2026
InstallationDate: Installed on 2025-10-27 (258 days ago)
InstallationMedia: Ubuntu-Server 24.04.3 LTS "Noble Numbat" - Release amd64 
(20250805.1)
ProcEnviron:
 LANG=en_GB.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=screen-256color
SourcePackage: zfs-linux
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.cron.d.zfsutils-linux: 2025-12-24T06:40:53.334752
mtime.conffile..etc.default.zfs: 2026-07-12T12:30:13.341749

** Affects: zfs-linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble

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https://bugs.launchpad.net/bugs/2160449

Title:
  Stray "rpool/export/vault/block" in zvol_wait

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