[LU-9544] 'lctl set_param -d fail_val=42' sets fail_val to 42

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Labels: easy
• Severity: 3
• Assignee: Fred Dilger
• Reporter: John Hammond

Description

The -d (for delete) option to lctl set_param should be rejected if the -P option wasn't used as well, or it should automatically imply the -P option. Currently if used alone the
-d option is handled as a plain set param:

# lctl set_param -d fail_val
error: set_param: setting fail_val: no value
# lctl set_param -d fail_val=42
fail_val=42
# lctl get_param fail_val
fail_val=42

Also, if a value is erroneously supplied when using -P and -d then instead of being deleted, the parameter is set to the value with a trailing '='. (The params log will contain the new value, but the param write method may reject it).

# lctl set_param -P jobid_name=foo
# sleep 10
# lctl get_param jobid_name
jobid_name=foo
# lctl set_param -P -d jobid_name=foo
# sleep 10
# lctl get_param jobid_name
jobid_name=foo=

Issue Links

• is related to: LU-17920 Add permanent TBF rules