[LU-16554] OUT UPDATE REPLY is always 4KiB on wire

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Vitaliy Kuznetsov
• Reporter: Nathaniel Clark

Description

OUT UPDATE Request always lists reply size as 4K in out_update_header (lustre/osp/osp_trans.c::osp_prep_update_req())

OUT UPDATE Reply blindly uses this size to create the pack size, not actually checking the size of the packed reply. lustre/target/out_handler.c::out_handle())

If the former behavior is changed, than the later behavior will break.  Currently there's a 4K buffer to hold ~100B of data.

 

 

 

Issue Links

• is related to: LU-16549 osp_prep_update_req() packs OUT_UPDATE incorrectly