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> -----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. -- Ben -- Opinions are mine, not Intel's > > Thanks a lot! > Stan > -- > Opinions expressed are those of the author and do not represent Intel > Corporation ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 _______________________________________________ Opengfs-devel mailing list Opengfs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opengfs-devel