Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754330AbbFSRjO (ORCPT ); Fri, 19 Jun 2015 13:39:14 -0400 Received: from mail-yh0-f52.google.com ([209.85.213.52]:36750 "EHLO mail-yh0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751028AbbFSRjJ (ORCPT ); Fri, 19 Jun 2015 13:39:09 -0400 MIME-Version: 1.0 In-Reply-To: <20150619131759.7b38d9de@gandalf.local.home> References: <20150611234929.7b48d314@gandalf.local.home> <1434120035.27504.77.camel@edumazet-glaptop2.roam.corp.google.com> <20150612113420.5c114183@gandalf.local.home> <20150612115038.44e20ccd@gandalf.local.home> <20150617230819.0a11e47a@grimm.local.home> <20150618154914.57424225@gandalf.local.home> <20150618185051.2b2828c3@tlielax.poochiereds.net> <20150618210843.4b09c31c@grimm.local.home> <20150618213702.33f64b20@synchrony.poochiereds.net> <20150619122553.43d2d86c@gandalf.local.home> <20150619131759.7b38d9de@gandalf.local.home> Date: Fri, 19 Jun 2015 13:39:08 -0400 Message-ID: Subject: Re: [REGRESSION] NFS is creating a hidden port (left over from xs_bind() ) From: Trond Myklebust To: Steven Rostedt Cc: Jeff Layton , Eric Dumazet , Anna Schumaker , Linux NFS Mailing List , Linux Network Devel Mailing List , LKML , Andrew Morton , Bruce James Fields Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1722 Lines: 50 On Fri, Jun 19, 2015 at 1:17 PM, Steven Rostedt wrote: > On Fri, 19 Jun 2015 12:25:53 -0400 > Steven Rostedt wrote: > > >> I don't see that 55201 anywhere. But then again, I didn't look for it >> before the port disappeared. I could reboot and look for it again. I >> should have saved the full netstat -tapn as well :-/ > > Of course I didn't find it anywhere, that's the port on my wife's box > that port 947 was connected to. > > Now I even went over to my wife's box and ran > > # rpcinfo -p localhost > program vers proto port service > 100000 4 tcp 111 portmapper > 100000 3 tcp 111 portmapper > 100000 2 tcp 111 portmapper > 100000 4 udp 111 portmapper > 100000 3 udp 111 portmapper > 100000 2 udp 111 portmapper > 100024 1 udp 34243 status > 100024 1 tcp 34498 status > > which doesn't show anything. > > but something is listening to that port... > > # netstat -ntap |grep 55201 > tcp 0 0 0.0.0.0:55201 0.0.0.0:* LISTEN Hang on. This is on the client box while there is an active NFSv4 mount? Then that's probably the NFSv4 callback channel listening for delegation callbacks. Can you please try: echo "options nfs callback_tcpport=4048" > /etc/modprobe.d/nfs-local.conf and then either reboot the client or unload and then reload the nfs modules before reattempting the mount. If this is indeed the callback channel, then that will move your phantom listener to port 4048... Cheers Trond -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/