[LU-17218] improve filter_fid upgrade compatibility

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.4
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

filter_fid could be expanded in later Lustre version, and with
upgrade then downgrade process, the filter_fid EA on disk
could has been expanded during upgrade, and won't work after
the downgrade.