Bug #19970: Reduce the potential for erroneous blacklisting due to release lock race - rbd - Ceph

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Bug #19970

closed

Reduce the potential for erroneous blacklisting due to release lock race

Added by Jason Dillaman almost 7 years ago. Updated almost 7 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Jason Dillaman

Target version:

% Done:

Source:

Tags:

Backport:

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

There is a potential race when a client attempts to acquire the exclusive lock. If the current lock owner closes the image (and releases the lock) between the time the new client lists the lock owner and lists the current watchers, the new lock owner can incorrectly blacklist the original owner that just released the lock. This situation can be detected randomly during the rbd-mirror integration test occationally.