[LU-9753] OFD destroy non-orphan OST-object because of overflow

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.10.1, Lustre 2.11.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

In ofd_create_hdl(), the logic will compare the OST stroed LAST_ID with the MDT given one: if the difference exceeds some threshold, then it will trust the OST LAST_ID directly and reset the MDT side value with the OST one. Otherwise, the orphan OST-objects will be destroyed.

Unfortunately, both the OST stored LAST_ID and MDT given one are 64 bits, but the @diff variable is only 32 bits, and if the OST side value is too larger than the MDT side, then the @diff will overflow. That will misguide the OST to destroy useful OST-objects by wrong.

Comments

[Gerrit Updater]

John L. Hammond ([e-mail]) merged in patch https://review.whamcloud.com/28230/
Subject: LU-9753 ofd: 64-bits diff variable to avoid overflow
Project: fs/lustre-release
Branch: b2_10
Current Patch Set:
Commit: 9903e1efd9bb1ddf0d74513c5036169d4a651bfe

[Gerrit Updater]

Minh Diep ([e-mail]) uploaded a new patch: https://review.whamcloud.com/28230
Subject: LU-9753 ofd: 64-bits diff variable to avoid overflow
Project: fs/lustre-release
Branch: b2_10
Current Patch Set: 1
Commit: bc01869cf4a41c85aa6b171a54a3fb197bd2ae6f