[LU-7528] sanity test_160b test_160c tests defect: changelog user is not deregistered on test failure

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.5.0
• Labels: patch test
• Environment: single node, 4-node
• Severity: 3
• Assignee: WC Triage
• Reporter: Kirtan Shetty (Inactive)

Description

The test 160b and 160c of sanity does not deregister the changelog users that they have registered so if tests which run "changelog_register" fails before "changelog_deregister $USER", then "changelog_deregister $USER" never gets executed and all changes (such as file creation, deletion, etc.) are still recorded. This can be the reason why tests stdouts are huge, they contain "lfs changelog lustre-MDT0000" results.

Example :

test_160b () {
...
    USER=$(do_facet $SINGLEMDS $LCTL --device $MDT0 changelog_register -n)
...
    touch $LONGNAME1 || error "create of $LONGNAME1 failed"
...
    echo "deregistering $USER"
    do_facet $SINGLEMDS $LCTL --device $MDT0 changelog_deregister $USER
...
}