[LU-6281] lock all of children during the directory migration

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

During directory migration, all of children's linkEA and parent will be updated, so we needs to lock all of sub children. Since ldlm lock is enqueued in MDT layer, we probably needs to iteration all of sub-children in MDT layer to enqueue all of ldlm locks? or there maybe better ideas here.