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Re: [RFC PATCH 1/2] Union Mount: glibc readdir support
- From: Erez Zadok <ezk at cs dot sunysb dot edu>
- To: bharata at linux dot vnet dot ibm dot com
- Cc: David Newall <davidn at davidnewall dot com>, Ulrich Drepper <drepper at redhat dot com>, bsn dot 0007 at gmail dot com, libc-alpha at sourceware dot org, Jan Blunck <jblunck at suse dot de>, Erez Zadok <ezk at cs dot sunysb dot edu>, linux-kernel at vger dot kernel dot org, linux-fsdevel at vger dot kernel dot org, viro at zeniv dot linux dot org dot uk, Christoph Hellwig <hch at lst dot de>, Mingming Cao <cmm at us dot ibm dot com>, Dave Hansen <haveblue at us dot ibm dot com>, Trond Myklebust <trond dot myklebust at fys dot uio dot no>, David Woodhouse <dwmw2 at infradead dot org>
- Date: Sun, 11 May 2008 23:49:35 -0400
- Subject: Re: [RFC PATCH 1/2] Union Mount: glibc readdir support
In message <20080512034341.GA10541@in.ibm.com>, Bharata B Rao writes:
> Answering my question to Erez that I raised in another thread, I see
> that Unionfs doesn't set the export_operations in it's superblock and
> hence I believe unions created by Unionfs aren't NFS-exportable as of
> know. Erez, correct me if I got it wrong.
Yes, the unionfs in -mm isn't nfs exportable safely, b/c it doesn't have
persistent inode numbers. Our unionfs-odf version has persistent inode
numbers and is exportable (see http://unionfs.filesystems.org/).
> Regards,
> Bharata.
Erez.