Date: Sat, 2 Jan 2010 10:36:17 +0100 From: Jeremie Le Hen <jeremie@le-hen.org> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-stable@FreeBSD.org, Jeremie Le Hen <jeremie@le-hen.org>, Rick Macklem <rmacklem@FreeBSD.org> Subject: Re: Cannot list a particular directory through NFS with UDP Message-ID: <20100102093617.GP84457@felucia.tataz.chchile.org> In-Reply-To: <Pine.GSO.4.63.0912311419170.22403@muncher.cs.uoguelph.ca> References: <20091213230650.GA45540@felucia.tataz.chchile.org> <Pine.GSO.4.63.0912181518280.9495@muncher.cs.uoguelph.ca> <20091229125603.GC84457@felucia.tataz.chchile.org> <Pine.GSO.4.63.0912311419170.22403@muncher.cs.uoguelph.ca>
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Rick, Thanks for your time on this. On Thu, Dec 31, 2009 at 02:23:32PM -0500, Rick Macklem wrote: > [stuff snipped] > >> This appears to be the reply to the nfs readdir request, which is what > >> would be expected. It could be a problem with the content or the reply > >> or a NetBSD client issue. > >> > >> If you were to email me the raw tcpdump capture for the above, I could > >> take a look at it in wireshark (which knows how to interpret nfs) and > >> see if there is anything bogus looking in the reply. > >> ("tcpdump -s 0 -w <file> host 192.168.1.1" and then email me <file> as an > >> attachment, should do it) > > > > You will find the pcap file attached. > > > Well, I looked at it under wireshark and the readdir reply looks fine. > (It is made up of two IP fragments, but wireshark reassembles them ok > and says the checksums are ok. The contents look like a valid Readdir > RPC reply.) Maybe NetBSD doesn't reassemble the IP fragments correctly > or has an issue w.r.t. the checksum, but Wireshark thinks it's aok. I will reduce the MTU and see if the problem arises with directories that could be read correctly otherwise. I will keep you informed. Does NFS permit to fragment/reassemble at the application layer? > ps: I vaguely recall that the problem went away when you used TCP > instead. Is that correct? Yes this is correct. Regards, -- Jeremie Le Hen Humans are born free and equal. But some are more equal than the others. Coluche
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