From owner-freebsd-current@FreeBSD.ORG Thu Jun 28 19:16:09 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 9A7EB106566B for ; Thu, 28 Jun 2012 19:16:09 +0000 (UTC) (envelope-from vince@unsane.co.uk) Received: from unsane.co.uk (unsane-pt.tunnel.tserv5.lon1.ipv6.he.net [IPv6:2001:470:1f08:110::2]) by mx1.freebsd.org (Postfix) with ESMTP id 0C8318FC12 for ; Thu, 28 Jun 2012 19:16:08 +0000 (UTC) Received: from vincemacbook.unsane.co.uk (vincemacbook.unsane.co.uk [10.10.10.20]) (authenticated bits=0) by unsane.co.uk (8.14.5/8.14.5) with ESMTP id q5SJG6eR003892 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Thu, 28 Jun 2012 20:16:07 +0100 (BST) (envelope-from vince@unsane.co.uk) Message-ID: <4FECAD2C.8070402@unsane.co.uk> Date: Thu, 28 Jun 2012 20:14:52 +0100 From: Vincent Hoffman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: "freebsd-current@freebsd.org" References: <4FE62269.2030706@unsane.co.uk> <4FEB2664.6000300@unsane.co.uk> In-Reply-To: <4FEB2664.6000300@unsane.co.uk> X-Enigmail-Version: 1.4.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: Occassional "permission denied" in the middle of a large transfer over NFS X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Jun 2012 19:16:09 -0000 Just a note to say I have tested this on -CURRENT with the new nfs server and it is still the case. On the client (FreeBSD seaurchin 8.3-RELEASE-p3 FreeBSD 8.3-RELEASE-p3 #0: Tue Jun 12 00:39:29 UTC 2012 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64) [root@seaurchin /mnt/nfs/vm]# date ; tar -cf foo.tar /var/nfsen/profiles-data/ ; date Thu Jun 28 20:12:36 BST 2012 tar: Removing leading '/' from member names tar: Write error Thu Jun 28 20:12:38 BST 2012 [root@seaurchin /mnt/nfs/vm]# on the Server [root@fbsd /var/tmp]# uname -a ; date ; while true ; do mount /dev/md0 /mnt/tmp/ ; umount /mnt/tmp ; done FreeBSD fbsd 10.0-CURRENT FreeBSD 10.0-CURRENT #22 r237646: Wed Jun 27 19:13:26 BST 2012 toor@fbsd.bmk.namesco.net:/usr/obj/usr/src/sys/unsane-vm amd64 Thu Jun 28 20:12:38 BST 2012 ^C [root@fbsd /var/tmp]# any suggestions welcome. Vince On 27/06/2012 16:27, Vincent Hoffman wrote: > Hi, > After only one off-list reply from the author of kern/136865 (see below) > after asking -questions, I thought it worth asking -CURRENT. > Basically: > > I seem to have run into the problems described in this old thread. > http://lists.freebsd.org/pipermail/freebsd-questions/2004-April/044927.html > > tl:dr mountd may give incorrect permission denied errors when it is > refreshing the exports list due to non-atomic operations, /sbin/mount has code that sends SIGHUP to > mountd on any mount operation, which implies that any manual mount > request would cause the problem. > > Currently I have still only tested on 8.3-RELEASE but the svn log doesnt > seem to mention a fix since then. I'm currently taking a VM up to > -CURRENT to test. > > Looking though old PRs I see the following related. > kern/131342 > kern/136865 (with patch for 7.2 and links to > http://nfse.sourceforge.net/ for -CURRENT ) > > Does anyone who is qualified (sadly not me) feel like looking at the > code to see if its suitable for inclusion in part/whole as not having > NFS transfers interrupted by local mount operations on the nfs server > would be very handy :) > > > thanks, Vince > > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"