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Re: [RFC PATCH 0/2] Union Mount: Directory listing in glibc
- From: Jan Blunck <jblunck at suse dot de>
- To: Erez Zadok <ezk at cs dot sunysb dot edu>
- Cc: bsn dot 0007 at gmail dot com, libc-alpha at sourceware dot org,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>,Ulrich Drepper <drepper at redhat dot com>, 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>,bharata at linux dot vnet dot ibm dot com, David Woodhouse <dwmw2 at infradead dot org>
- Date: Tue, 29 Apr 2008 18:16:03 +0200
- Subject: Re: [RFC PATCH 0/2] Union Mount: Directory listing in glibc
- References: <20080429133201.GA9938@localhost.localdomain> <200804291549.m3TFnb3H024733@agora.fsl.cs.sunysb.edu>
On Tue, Apr 29, Erez Zadok wrote:
> Also, I'll reiterate my previous concern that I think you may need to also
> handle "opaque directories". See the discussion in section 5.1 "Creation
> and deletion of whiteouts", in the original union mounts paper:
Hmm, if kernel is traversing to the next layer in an union and it finds it to
be opaque the kernel knows that this is the "end" of the union. So after
reading that directory it is done.
Regards,
Jan
--
Jan Blunck <jblunck@suse.de>