On Fri, Mar 30, 2007 at 09:04:16PM +0200, Jan Engelhardt wrote: > > On Mar 30 2007 15:38, Bharata B Rao wrote: > > > >In union mount approach we maintain this stacking information in the > >dentry structure. When a filesytem is union mounted on a mountpoint, > >the dentry of the mount root would hold a reference to the mountpoint > >dentry as an overlaid dentry and these two dentries together form a > >union stack. Any subsequent readdir operation on this union mounted > >dentry would work on the overlaid dentry also thereby providing the > >merged view of the two filesystems. > > What about whiteouts? (I cannot remember whether Jan Blunk's paper > mentioned it at all.)
We do have whiteout support. And as I mentioned earlier, the underlying filesystem needs to support the new 'whiteout' filetype. As of now it is supported for ext2, ext3 and ramfs. Regards, Bharata. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
