Date: Tue, 29 Jun 2010 10:49:02 +0400 From: alexs@ulgsm.ru To: freebsd-stable@freebsd.org Subject: Re: diskless boot, nfs server behind router Message-ID: <20100629064902.GA39446@mail.ulgsm.ru> In-Reply-To: <Pine.GSO.4.63.1006282038070.20639@muncher.cs.uoguelph.ca> References: <20100625152027.GA78442@mail.ulgsm.ru> <Pine.GSO.4.63.1006252008340.8512@muncher.cs.uoguelph.ca> <20100626113418.GA80299@mail.ulgsm.ru> <Pine.GSO.4.63.1006261020100.15701@muncher.cs.uoguelph.ca> <20100628061601.GA51359@mail.ulgsm.ru> <20100628102703.GA78354@mail.ulgsm.ru> <Pine.GSO.4.63.1006281011180.8202@muncher.cs.uoguelph.ca> <E1OTFDh-000OrT-LR@kabab.cs.huji.ac.il> <Pine.GSO.4.63.1006282038070.20639@muncher.cs.uoguelph.ca>
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* Rick Macklem <rmacklem@uoguelph.ca> [2010-06-28 20:41:17 -0400]:
>
>
> On Mon, 28 Jun 2010, Daniel Braniss wrote:
>
> >>
> >>
> >> On Mon, 28 Jun 2010, alexs@ulgsm.ru wrote:
> >>
> >>>
> >>>
> >>> kernel built with:
> >>> options BOOTP # Use BOOTP to obtain IP address/hostname
> >>> options BOOTP_NFSROOT # NFS mount root file system using BOOTP info
> >>> options BOOTP_NFSV3
> >>>
> >> Try building a kernel without the above options, but with
> >> options NFS_ROOT
> >> specified. I think that's what most pxeboot users do and it was what
> >> I had assumed when I looked at the code.
> >>
> >> If that doesn't fix the problem...I haven't got a solution for you, rick
> >
> > I use:
> > options BOOTP_NFSV3 # Use NFS v3 to NFS mount root
> >
> Looking at the code, it appears that BOOTP_NFSROOT doesn't set mygateway
> in the nfs_diskless structure, which would explain why the mount of root
> in the kernel doesn't work.
>
> I think using NFS_ROOT but not the BOOTPxxx options will work around this
> or you could test the following patch and see if it helps. (Testing the
> patch would be appreciated, since I don't have any way to test across
> multiple subnets and it would be nice to have a fix for the BOOTPxxx
> cases.)
>
> rick
> --- untested patch for bootp_subr.c ---
> --- nfsclient/bootp_subr.c.sav 2010-06-28 19:16:02.000000000 -0400
> +++ nfsclient/bootp_subr.c 2010-06-28 19:21:52.000000000 -0400
> @@ -1524,6 +1524,7 @@
> printf(" ");
> ifctx->gotgw = 1;
> gctx->gotgw = 1;
> + nd->mygateway = ifctx->gw;
> }
> }
Yes. without BOOTPxxx options boot is fine.
I tryed your path with BOOTPxxx options, result panic.
Trying to mount root from nfs:
Panic: nfs_mountroot: RTM_ADD: 17
cpuid=1
Uptime 10s
>
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--
alexs
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