[Ocfs2-devel] [PATCH 9/9] ocfs2/dlm: Fix race during lockres mastery

[Mark Fasheh]

On Tue, Dec 16, 2008 at 03:49:23PM -0800, Sunil Mushran wrote:
> dlm_get_lock_resource() is supposed to return a lock resource with a proper
> master. If multiple concurrent threads attempt to lookup the lockres for the
> same lockid while the lock mastery in underway, one or more threads are likely
> to return a lockres without a proper master.
> 
> This patch makes the threads wait in dlm_get_lock_resource() while the mastery
> is underway, ensuring all threads return the lockres with a proper master.
> 
> This issue is known to be limited to users using the flock() syscall. For all
> other fs operations, the ocfs2 dlmglue layer serializes the dlm op for each
> lockid.
> 
> Patch fixes Novell bz#425491
> https://bugzilla.novell.com/show_bug.cgi?id=425491

Btw, removed the bz url because the bug isn't globally readable. I don't
know if that's an official policy or anything, I just figured that since
only a limited set could read it...
	--Mark

--
Mark Fasheh