[Ocfs2-devel] lvb length issue [was Re: [ocfs2-tools-devel] question of ocfs2_controld (Jun 27)]

[Coly Li]

Sunil Mushran Wrote:
> David Teigland wrote:
>> Yes, the kernel dlm api allows a variable lvb size, but the user dlm
>> api fixes
>> it at 32.
>>
>> Do you need to actually use a 64 byte lvb from userspace?  Or do you
>> just need
>> to create the locksapce with a 64 byte lvb?  We could add a flag to work
>> around the later fairly easily.  Changing the dlm user/kernel
>> interface to
>> copy variable size lvb's would take some significant work.
> 
> I guess the problem here is that Coly is attempting to run mkfs on a volume
> that is mounted on another node. mkfs.ocfs2 joins the lockspace to
> ensure it
> is not in use across the cluster, before cleaning out the superblock. If
> it is
> mounted, the lockspace would have been created by the fs... meaning
> 64-byte lvb.
> 
> Coly, is this correct?

Yes, this is what I mean.



-- 
Coly Li
SuSE Labs