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On Thu, 2003-08-07 at 22:55, Cahill, Ben M wrote:
> > -----Original Message-----
> > From: Stanley Wang [mailto:stanley.wang@linux.co.intel.com]
> > Sent: Wednesday, August 06, 2003 11:16 PM
> > To: opengfs-devel@lists.sourceforge.net
> > Subject: RE: [ogfs-dev]Map OpenDLM to G-lock
>
> >
> > > The "lockspace" I think just needs a new instance of the
> > lock module for each new instance of the filesystem. I never
> > could quite figure out why current ogfs code has a check for
> > the cidev uniqueness (*or*, I might be mis-understanding the
> > code), except perhaps that ogfs might require a separate
> > cluster description for each and every instance of the
> > filesystem. Logically, though, I'm not sure if we should
> > need to require such a thing (I may not know enough here).
> > lockspace is used to distinguish different instances of lock
> > module. And
> > we may get it basing any unique thing for a OGFS instace. Hence it
> > doesn't matter whether it is based cidev.
> > I don't think the ogfs would check the uniqueness of cidev also, but
> > cidev is a unique component for a OGFS instance indeed.
> > Maybe we could use the main OGFS partition's name as the lockspace :)
>
> I'm looking at code in lock harness.c, and locking.c, and man pages for mkfs.ogfs and ogfs_mount, and ogfs_tool(!) . . . the mount call to the locking module gets passed the following params which might be useful for this purpose:
>
> 1) table -- set by mkfs.ogfs *or* can be overridden by mount command. Used by memexp for cidev, I think you could use it for whatever you want!
>
> 2) data -- info from "hostdata=" IP address (maybe more?) on mount command. You might be able to use this for another purpose, as well.
>
> 3) fs_data -- pointer to filesystem's incore superblock (fs instance identifier). This uniquely identifies the filesystem instance.
>
Thanks for your hints :)
> -- Ben --
>
> Opinions are mine, not Intel's
>
>
> >
> > Thanks a lot!
> > Stan
> > --
> > Opinions expressed are those of the author and do not represent Intel
> > Corporation
>
>
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