Date: Fri, 19 Oct 2001 16:02:46 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: Dag-Erling Smorgrav <des@ofug.org> Cc: Alfred Perlstein <alfred@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/etc/defaults rc.conf Message-ID: <Pine.NEB.3.96L.1011019154254.72418C-100000@fledge.watson.org> In-Reply-To: <xzpd73kab3g.fsf@flood.ping.uio.no>
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On 18 Oct 2001, Dag-Erling Smorgrav wrote:
> Alfred Perlstein <alfred@FreeBSD.org> writes:
> > Log:
> > Update to note that rpc.statd and rpc.lockd are now needed for
> > client side NFS mounts.
>
> How about "documenting" this dependency in rc.network, as was done for
> the portmapper?
Running the current nfs_lock.c code can have fascinating effects on the
correctness of system operation. Before we start enabling the userland
daemon automatically, we should fix those problems. These include at
least:
(1) Incorrect management of credentials such that a surprising set of
processes and related objects gain root privilege during potentially
blocking operations.
(2) The /var/run/lock fifo is looked up using the current process's
working/root directory, so if you have chroot'd processes, you might
get unexpected results. For example, if you chroot a user to their
home directory, locking won't work, but if they're not chrooted, it
will. I won't speculate on the correctness of running multiple
rpc.lockd's. :-)
I'm willing to work on (1) (and have some patches that begin to address
the problem), but (2) will probably require some re-writing to address, as
well as possibly some experimentation to determine the scope of the
problem.
Robert N M Watson FreeBSD Core Team, TrustedBSD Project
robert@fledge.watson.org NAI Labs, Safeport Network Services
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