[LU-15381] Obtain file size information under locks for HSM release

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Severity: 3
• Assignee: Qian Yingjin
• Reporter: Qian Yingjin

Description

In HSM release, it obtains file size and blocks information via @ll_merge_attr without any lock protection, it may get the wrong file size.

we found a bug that a HSM restore followed by a HSM release will set the file size with 0 wrongly.

Comments

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/45935/
Subject: LU-15381 hsm: update size upon completion of data version
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: dd3b5601ec6905b00d07cbcb8c139c46dd555b3b

[Gerrit Updater]

"Yingjin Qian <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/45935
Subject: LU-15381 hsm: update size upon completion of data version
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: b8d2a67253538f17f46e244a264d02d80a528548

[Qian Yingjin]

As we use data version to flush all cache and revoke the locks on all clients, thus we could update the size and block attributes in data version operations (however, it still does not protect with any locks)?

By this way, we can avoid the glimpse RPC to get the file size?

Will make a patch sooner.