[LU-17297] tgt_grant_sanity_check()) ofd_obd_disconnect: tot_granted 0 != fo_tot_granted 8388608 during recovery

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Vladimir Saveliev
• Reporter: Vladimir Saveliev

Description

When stale client is evicted on expired recovery - class_disconnect_stale_exports() first moves the export out from obd->obd_exports list:

class_disconnect_stale_exports
   list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
      list_move(&exp->exp_obd_chain, &work_list);

Then tgt_grant_sanity_check is callled:

class_disconnect_stale_exports
   class_disconnect_export_list
      obd_disconnect
         ofd_obd_disconnect (or mdt_obd_disconnect)
            tgt_grant_sanity_check

which iterates obd->obd_exports and obd->obd_unlinked_exports lists to sum grant counters: tot_dirty, tot_pending, tot_granted.

As the export being disconnected is neither on obd->obd_exports nor on obd->obd_unlinked_exports - the total grant counters mismatch with something like:

[128451.745573] LustreError: 182349:0:(tgt_grant.c:257:tgt_grant_sanity_check()) ofd_obd_disconnect: tot_granted 0 != fo_tot_granted 8388608