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Bug 1083590

Summary: "thin_check --clear-needs-check" erroneously resets needs_check flag even on metadata errors
Product: Red Hat Enterprise Linux 7 Reporter: Heinz Mauelshagen <heinzm>
Component: device-mapper-persistent-dataAssignee: Joe Thornber <thornber>
Status: CLOSED NEXTRELEASE QA Contact: yanfu,wang <yanwang>
Severity: urgent Docs Contact:
Priority: high    
Version: 7.0CC: agk, heinzm, lvm-team, msnitzer, thornber, yanwang
Target Milestone: rcKeywords: Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-04-03 14:41:59 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1083633    
Attachments:
Description Flags
Log of device-mapper-test-suite NeedsCheck test case run none

Description Heinz Mauelshagen 2014-04-02 14:05:12 UTC
Description of problem:

In case the kernel sets the "needs_check" flag on thin provisioning metadata
because of an io error, "thin_check --clear-needs-check" resets it
erroneously even when metadata is in error causing the pool to be reloaded in read/write mode rather than read-only.

This is critical, because the metadata errors have not been fixed thus
potentially causing more damage if activated read/write.


Version-Release number of selected component (if applicable):


How reproducible:

Always.
device-mapper-test-suite contains a test (-n /NeedsCheck/)

Steps to Reproduce:
1. Set up device-mapper-test-suite as described in README.md
2. Run "dmsetup run --suite era -n /NeedsCheck/
3.

Actual results:
Test fails.

Expected results:
Test succeeds.

Additional info:

Comment 1 Heinz Mauelshagen 2014-04-02 14:09:10 UTC
Created attachment 881811 [details]
Log of device-mapper-test-suite NeedsCheck test case run

Comment 2 Heinz Mauelshagen 2014-04-02 14:13:08 UTC
Proper command to run the test is:

"dmtest run --suite thin-provisioning -n /NeedsCheck/"