[LU-8050] Drop llog_cookie usage from RPC on wire data

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

Originally, obdo::o_lcookie is for destroy with unlink cookie from MDS, it is obsolete in 2.8. And then, it is reused by the OSP to save on memory allocations as following comment:

        /*
         * this is a trick: to save on memory allocations we put cookie
         * into the request, but don't set corresponded flag in o_valid
         * so that OST doesn't interpret this cookie. once the request
         * is committed on OST we take cookie from the request and cancel
         */

Currently, we needs more fields in the obdo structure to transfer more information from client to OST. The obdo::o_lcookie is good candidate. So we need adjust OSP logic to NOT use such field for non-onwire RPC data usage.

Comments

[nasf (Inactive)]

The patch has been landed to master.

[Gerrit Updater]

Bobi Jam ([e-mail]) uploaded a new patch: https://review.whamcloud.com/26395
Subject: LU-8050 osp: not use obdo::o_lcookie for non-onwire RPC data
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: c6efa24974c3b9b20fca837a8d697ab9b58ef570

[Gerrit Updater]

Jinshan Xiong ([e-mail]) merged in patch https://review.whamcloud.com/24876/
Subject: LU-8050 osp: not use obdo::o_lcookie for non-onwire RPC data
Project: fs/lustre-release
Branch: pfl
Current Patch Set:
Commit: b324d313b92fd1da3f85280b7cc84ea9fa24a5cc

[Gerrit Updater]

Niu Yawei ([e-mail]) uploaded a new patch: https://review.whamcloud.com/24876
Subject: LU-8050 osp: not use obdo::o_lcookie for non-onwire RPC data
Project: fs/lustre-release
Branch: pfl
Current Patch Set: 1
Commit: c79ef5ad1e51d55fc85e7f2fdf91e10bf76029a0

[Gerrit Updater]

Fan Yong ([e-mail]) uploaded a new patch: http://review.whamcloud.com/19784
Subject: LU-8050 osp: not use obdo::o_lcookie for non-onwire RPC data
Project: fs/lustre-dev
Branch: pfl
Current Patch Set: 1
Commit: e78d8a22c12d37084f8db64882793bd1c5013519