[LU-15971] Implicit default LMV inherit

• Type: New Feature
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Assignee: Lai Siyao
• Reporter: Lai Siyao

Description

With implicit default LMV inherit, the inherited default LMV is maintained on client side.

Benefits:

• change of directory default LMV will be populated to all sub levels at runtime automatically.
• default LMV will be packed into mkdir request, therefore MDT doesn't need read it from disk, as will improve mkdir performance.

Caveats:

• old and new clients can't coexist, because after new client mkdir,
  the inherited default LMV is not set on MDT inode, then the old
  client won't know its existence.

Changes on client side:

• update default LMV after lookup/open/revalidate.
• pack default LMV in mkdir request.

Changes on MDT side:

• use the default LMV from client in lod_ah_init().
• don't save inherited default LMV in mkdir.

Comments

[Peter Jones]

Seems to have all landed for 2.16

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/47789/
Subject: LU-15971 llite: implicit default LMV inherit
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 388a185eace0e6b16a5f7fa3a373c9c93cac12bc

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50798
Subject: LU-15971 test: interop test with 2.14
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d43b478e214f11fec5086027f5b9e8c3b9b8e259

[Xing Huang]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47789
Subject: LU-15971 llite: implicit default LMV inherit
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6e317b39c57463979faf061b544abc48649a9488

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/47788/
Subject: LU-15971 uapi: add DMV_IMP_INHERIT connect flag
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 203745e7b07101bb682ac8a519148bad25be76a5

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/47843/
Subject: LU-15971 llite: match lock in corresponding namespace
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 64264dc424ca13d902bdad3066add5bf9b4e8cfc

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47884
Subject: LU-15971 llite: implicit default LMV inherit
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 46720f505dd1ba78aa1f27bb78d8092f8f1c6b43

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47843
Subject: LU-15971 llite: match lock in correct namespace in cancel
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: ba3655666bc159e85896dabeb4e9f85ef555bf8e

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47788
Subject: LU-15971 uapi: add DMV_IMP_INHERIT connect flag
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 2307631a6a8f264daed0e57dd46e801d73bbc1c5