[LU-3336] LFSCK II: MDT-OST OST orphan handling

• Type: New Feature
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.6.0
• Affects Version/s: Lustre 2.6.0
• Labels: LFSCK
• Story Points: 89

Epic

layout

• Assignee: nasf (Inactive)
• Reporter: Andreas Dilger

Description

This ticket relates to handling of OST orphan cleanup. This includes:

• create an in-memory bitmap for OST FIDs that have been referenced during MDS Pass 1 checking
• after the OST Pass 2 scanning is complete, any OST objects that have not been referenced need to be verified with the MDT, and added to lost+found or unlinked (depending on administrator preference)

Issue Links

• is blocked by: LU-3469 OSP dt_sync() operation should flush pending destroys and other updates
• is blocking: LU-1267 LFSCK II: MDT-OST consistency check/repair
• is related to: LU-4670 suite sanity test_222a test223: f223.sanity1: No such file or directory
• is related to: LU-11302 schedule while atomic with lfsck code