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Date:      Fri, 19 Feb 2010 16:52:35 +0100
From:      Marius Strobl <marius@alchemy.franken.de>
To:        Kostik Belousov <kostikbel@gmail.com>
Cc:        Boris Kochergin <spawk@acm.poly.edu>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>, Rick Macklem <rmacklem@uoguelph.ca>
Subject:   Re: Can't load NFS server module with a custom 8.0 kernel
Message-ID:  <20100219155235.GU50825@alchemy.franken.de>
In-Reply-To: <20100218220714.GU50403@deviant.kiev.zoral.com.ua>
References:  <4B7D74A7.6010006@acm.poly.edu> <Pine.GSO.4.63.1002181455240.22960@muncher.cs.uoguelph.ca> <4B7D9C5C.1090909@acm.poly.edu> <20100218220714.GU50403@deviant.kiev.zoral.com.ua>

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On Fri, Feb 19, 2010 at 12:07:14AM +0200, Kostik Belousov wrote:
> On Thu, Feb 18, 2010 at 03:00:28PM -0500, Boris Kochergin wrote:
> > Rick Macklem wrote:
> > >
> > >
> > >On Thu, 18 Feb 2010, Boris Kochergin wrote:
> > >
> > >>Ahoy. I didn't get any replies to this on -net, so I thought I'd try 
> > >>here. I have an 8.0-RELEASE-p2/amd64 machine running a custom kernel 
> > >>(configuration file at http://acm.poly.edu/~spawk/ACM) and I am 
> > >>unable to use the NFS server module on it. After loading the nfssvc 
> > >>module, attempting to load the nfsserver module fails and the 
> > >>following appears in dmesg:
> > >>
> > >>Feb  3 19:35:54 acm kernel: link_elf_obj: symbol svcpool_create 
> > >>undefined
> > >>Feb  3 19:35:54 acm kernel: linker_load_file: Unsupported file type
> > >>
> > >>I see a reference to the problem at 
> > >>http://lists.freebsd.org/pipermail/svn-src-all/2008-November/001025.html. 
> > >>Am I missing something or has it never gotten resolved? Thanks.
> > >>
> > >I don't know diddly about the module loading stuff, but you could try
> > >this patch. (svcpool_create() is a part of the krpc, which is listed
> > >as a module that nfsserver depends on)
> > >
> > >rick
> > >--- untested patch for nfs_srvsubs.c ---
> > >--- nfsserver/nfs_srvsubs.c.sav    2010-02-18 14:41:52.000000000 -0500
> > >+++ nfsserver/nfs_srvsubs.c    2010-02-18 14:42:12.000000000 -0500
> > >@@ -554,7 +554,7 @@
> > >     nfsrv_modevent,
> > >     NULL,
> > > };
> > >-DECLARE_MODULE(nfsserver, nfsserver_mod, SI_SUB_VFS, SI_ORDER_ANY);
> > >+DECLARE_MODULE(nfsserver, nfsserver_mod, SI_SUB_VFS, SI_ORDER_FIRST);
> > >
> > > /* So that loader and kldload(2) can find us, wherever we are.. */
> > > MODULE_VERSION(nfsserver, 1);
> > Thanks for the patch, but the problem persists with it, I'm afraid.
> 
> I think this is changed in HEAD, and part of the changes are already in
> stable/8, which is different from 8.0 too.
> 
> Anyway, for HEAD nfsserver we need 1. nfscommon 2. nfs_common.

Could you please elaborate on why nfsserver requires the former?
At least as far as svcpool_create() is concerned I see no reason
why it should require nfscommon. Also, when testing r203968 the
following list of modules where sufficient to have both nfsclient
and nfsserver working:
krpc.ko
nfs_common.ko
nfsclient.ko
nfslockd.ko
nfsserver.ko
nfssvc.ko

Marius




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