[LU-16538] Return PR or PW lock mode for OPEN ibits lock for DoM files

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Assignee: WC Triage
• Reporter: Qian Yingjin

Description

In the current Lustre, an OPEN ibits lock returned to a client is mandatorily setting to specific lock mode:
open mode lock mode

• FMODE_WRITE CW
• FMODE_EXEC PR
• other CR

For DoM files, it would better to return the corresponding DOM ibits lock together (combined) with OPEN ibits to a client during the open() or open-ahead(https://jira.whamcloud.com/browse/LU-16429) for the possible subsequent read or write, which can reduce extra lock traffic for DOM ibits lock.

The client needs to handle for PW or PW OPEN ibits lock properly.

Comments

[Gerrit Updater]

"Qian Yingjin <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50018
Subject: LU-16538 mdt: reserve connect flag for open lock modes
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: ccbb70172571a1bdb8096781492b7cc213680a08

[Gerrit Updater]

"Qian Yingjin <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50006
Subject: LU-16538 dom: return PR or PW mode lock with OPEN|DOM bits
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6748459a9b97569bd106571b777bdcaee2f04383

[Gerrit Updater]

"Qian Yingjin <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/49997
Subject: LU-16538 llite: use lock flags to distingush OPEN ibits lock
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8a6a2a20e3a9af99949354983cdd888fa9d72610