Date: Mon, 16 Feb 2015 11:29:51 +0200 From: Beeblebrox <zaphod@berentweb.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-net@freebsd.org Subject: Re: NFS and diskless: some questions re nfs_diskless.c Message-ID: <20150216112951.0b4ff5cd@rsbsd.rsb> In-Reply-To: <424747461.3929611.1424048192500.JavaMail.root@uoguelph.ca> References: <20150215174056.34912959@rsbsd.rsb> <424747461.3929611.1424048192500.JavaMail.root@uoguelph.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi again, Rick.
> If you are using a pxeboot built with this code, I don't know why you
> would still get NFSv2 instead of NFSv3. (Check the line for "/" in
> the diskless root's /etc/fstab <and> try adding the "nfsv3" option.
* I added nfsv3 to the client fstab as advised, but get same result (V2). Tested separately with Grub AND FreeBSD's pxeboot file.
* The probable reason is that my kernel has everything thrown in, but not BOOTP_NFSV3:
{ NFSCL, NFS_ROOT, KRPC, BOOTP, BOOTP_NFSROOT } (NFSD NFSLOCKD get loaded as modules). This is based on a prior discussion on the lists, one which in retrospect I seem to have mis-understood (http://freebsd.1045724.n5.nabble.com/PXE-boot-using-Grub-bootloader-fails-at-mountroot-no-PXE-devs-td5924518.html#a5925420)
In that discussion, while trying to use Grub as my pxeboot, I thought the solution was "build your kernel with BOOTP, BOOTP_NFSROOT"; whereas the more elegant solution was perhaps to find a way to "fill in the structure nfsv3_diskless" in grub.cfg or elsewhere. So I think I'll try to fix this by your suggestion of:
> I think if you build a kernel with "options NFS_ROOT" (but not the
> others), a boot loader can fill in the environment variables and have
> them used, just like pxeboot does.
Unless, above solution conflicts with my other objective, which is to "override the root fs"
> you can set this environment variable (look at bootpc_init()
> if you are using the BOOTP + BOOTP_NFSROOT
You mean using vfs.root.mountfrom I assume? But please clarify: Do you mean I can "override the root fs" if only I'm using BOOTP and not when using NFS_ROOT?
Thanks and Regards.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150216112951.0b4ff5cd>