[LU-20026] Add missing update llog reference deletion in lod_update_log_gc()

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.18.0
• Affects Version/s: Lustre 2.17.0
• Labels: llog lod recovery
• Severity: 2
• Assignee: Nikitas Angelinas
• Reporter: Nikitas Angelinas

Description

There is a missing object reference deletion in lod_update_log_gc(), which can cause e2fsck to consider the update llog unattached and move it to lost+found:

     # e2fsck -E no_optimize_extents -f -v -t -t -n <device node>
    ...
    Pass 4: Checking reference counts
    Unattached inode 141
    Connect to /lost+found? no

    Unattached inode 70665135
    Connect to /lost+found? no
    ...