[LU-2914] Separate LFSCK code from MDD layer to an new LFSCK layer

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.5.0
• Affects Version/s: Lustre 2.5.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

The new LFSCK will be independent from the MDD module. It can talk with MDT, LOD, and local storage lib.

The work needs to handle linkEA, which will be moved from MDD to shared lib by Wangdi recently.