Date: Mon, 03 Aug 1998 12:28:48 -0700 From: Mike Smith <mike@smith.net.au> To: Parag Patel <parag@cgt.com> Cc: Mike Smith <mike@smith.net.au>, freebsd-current@FreeBSD.ORG Subject: Re: NFS diskless booting (NFS root/swap) broken in -current? Message-ID: <199808031928.MAA00572@dingo.cdrom.com> In-Reply-To: Your message of "Mon, 03 Aug 1998 12:15:01 PDT." <199808031915.MAA20516@pinhead.parag.codegen.com>
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>
> >Do you have 'options NFS_ROOT' in your kernel config?
>
> Yup, sure do.
>
>
> >It might help to check the nfs_diskless_valid flag, and maybe dump the
> >nfs_diskless structure just to see whether it's coming in correctly.
> >The family is set by the bootstrap, so if it's not copied, it's not
> >going to work.
>
> It's set to 0 (not valid).
If it's set to zero, then locore.c has not copied the structure in from
low memory. You might want to be looking at this fragment there:
#ifdef NFS
#ifndef BOOTP_NFSV3
/*
* If we have a nfs_diskless structure copy it in
*/
movl BI_NFS_DISKLESS(%ebx),%esi
cmpl $0,%esi
je olddiskboot
movl $R(_nfs_diskless),%edi
movl $NFSDISKLESS_SIZE,%ecx
cld
rep
movsb
movl $R(_nfs_diskless_valid),%edi
movl $1,(%edi)
#endif
#endif
The nfs_diskless_valid flag is also fiddled in sys/nfs/bootp_subr.c; a
quick look at the code leaves me a little seasick, but it's not clear
at all that the nfs_diskless structure is properly populated in that
case.
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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