Date: Wed, 27 Jun 2012 16:27:32 +0100 From: Vincent Hoffman <vince@unsane.co.uk> To: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Occassional "permission denied" in the middle of a large transfer over NFS Message-ID: <4FEB2664.6000300@unsane.co.uk> In-Reply-To: <4FE62269.2030706@unsane.co.uk> References: <4FE62269.2030706@unsane.co.uk>
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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
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