[LU-8410] fiemap vs walk race

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.9.0
• Labels: patch
• Severity: 3
• Assignee: WC Triage
• Reporter: Artem Blagodarenko (Inactive)

Description

Alexey Lyashkov have troubles with accessing this jira and asked my to create this issue. Here is problem description from him:

RHEL6.5 have a backported a upstream commit 91dd8c114499e9818f2d5919ef0b9eee61810220, which broke a lustre extent handing on OFD. But Intel have a copy-paste unfixed code and use with RHEL 6.5 and up code. It's looks wrong as it have don't fixed a fiemap vs walk race while fiemap used in lustre code now (lustre commit - 144b5a65c16f1bca81ae76010528a592c821308b)
it may produce an predictable results with memory corruption.

attached patch backport a new api from kernel upstream already supported in lustre.

Comments

[Peter Jones]

Landed for 2.9

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/21603/
Subject: LU-8410 ldiskfs: new FIEMAP API
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 036912c414a25bfa56d8702533034ca5277aa4b3

[Gerrit Updater]

Artem Blagodarenko ([e-mail]) uploaded a new patch: http://review.whamcloud.com/21603
Subject: LU-8410 ldiskfs: new FIEMAP API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 590ec316194a57d32b0d5c2e567111f1bd640c3b

[Andreas Dilger]

Artem, can you please submit the patch to Gerrit and add Yang Sheng and Bruno as reviewers.

Please fix the patch summary line to be "... new FIEMAP API" to make this more clear what the patch is for, and also capitalize the sentences in the body of the commit message. s/fiemap/FIEMAP/, s/depricated/deprecated/.