[LU-2640] deactivate OSD_EXEC_OP() operation accounting if operation is being undone

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Labels: MB
• Severity: 4
• Assignee: nasf (Inactive)
• Reporter: Andreas Dilger

Description

In http://review.whamcloud.com/5046 there was a change to OSD_EXEC_OP() to address problems in MDD operations that fail part-way through, where the undo of earlier operations causes internal osd-ldiskfs declare/execute accounting to fail. For example, in mdd_create()::cleanup, the failed create calls __mdd_index_delete(), mdo_ref_del(), mdo_destroy() in order to clean up the newly created object.

One proposal is to have some kind of OSD API call/flag/method to mark the transaction handle as being used for rollback, and to disable the ot_declare_op LASSERT() checking in OSD_EXEC_OP() for this case.

Issue Links

• is duplicated by: LU-2668 mdd_create() failed at error path with osd_object_ref_del() ASSERTION( (oh)->ot_declare_ref_del > 0 ) failed