[LU-5794] improve credit checks in osd-ldiskfs

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.6.0, Lustre 2.7.0
• Environment: ldiskfs
• Assignee: Alex Zhuravlev
• Reporter: Alex Zhuravlev

Description

the current schema can't detect how the credits are consumed while a transaction is going. so, it's hard to understand which specific operation consumes too much. also, the schema doesn't support rollback operations properly which may cause false assertions.

Issue Links

• is related to: LU-4528 osd_trans_exec_op()) ASSERTION( oti->oti_declare_ops_rb[rb] > 0 ) failed: rb = 0
• is related to: LU-5770 wrong tx credit calculations in mdd_declare_links_add()