/lib/systemd/system/lvm2-lvmlocking.service is in lvm2-lockd 2.02.176-4.1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Description=Availability of lockspaces in lvmlockd
Documentation=man:lvmlockd(8)
After=lvm2-lvmlockd.service sanlock.service dlm.service
[Service]
Type=oneshot
RemainAfterExit=yes
# start lockspaces and wait for them to finish starting
ExecStart=/sbin/lvm vgchange --lock-start --lock-opt autowait
# auto activate LVs in the newly started lockd VGs
ExecStart=/sbin/lvm vgchange -aay -S 'locktype=sanlock || locktype=dlm'
# deactivate LVs in lockd VGs
ExecStop=/sbin/lvm vgchange -an -S 'locktype=sanlock || locktype=dlm'
# stop lockspaces and wait for them to finish stopping
ExecStop=/sbin/lvmlockctl --stop-lockspaces --wait 1
[Install]
WantedBy=multi-user.target
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