Date: Thu, 31 Jan 2013 12:53:22 +0100 From: Andre Oppermann <andre@freebsd.org> To: "Eggert, Lars" <lars@netapp.com> Cc: Craig Rodrigues <rodrigc@crodrigues.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: mounting root from NFS via ROOTDEVNAME Message-ID: <510A5B32.4070501@freebsd.org> In-Reply-To: <D4D47BCFFE5A004F95D707546AC0D7E91F6B8297@SACEXCMBX01-PRD.hq.netapp.com> References: <D4D47BCFFE5A004F95D707546AC0D7E91F671642@SACEXCMBX01-PRD.hq.netapp.com> <CAG=rPVergKVKUO=VySvM65WPJO_Od1tkWvx45tM_sEyO65mwUg@mail.gmail.com> <19F92E0C-F004-4F16-A5FC-A10DF84BDCCF@netapp.com> <D4D47BCFFE5A004F95D707546AC0D7E91F674CDE@SACEXCMBX01-PRD.hq.netapp.com> <CAG=rPVezTjcTp_AXsOMWYCSM1_xFJDvmUwdguHdZBABanGGrxw@mail.gmail.com> <D4D47BCFFE5A004F95D707546AC0D7E91F69BF73@SACEXCMBX01-PRD.hq.netapp.com> <CAG=rPVceQaKeprUyTXZyK13FSk2NY2sFT8LvG=wbQWsk08wwBQ@mail.gmail.com> <D4D47BCFFE5A004F95D707546AC0D7E91F6B8297@SACEXCMBX01-PRD.hq.netapp.com>
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On 31.01.2013 12:27, Eggert, Lars wrote: > Hi, > > On Jan 30, 2013, at 22:43, Craig Rodrigues <rodrigc@crodrigues.org> wrote: >> What you need to do is, before the FreeBSD kernel boots, your >> loader needs to export some environment variables. This will trigger >> the various behaviors in the FreeBSD mount code. > > the loader can export some environment variables (this is how I get the serial console working.) > >> So as I suggested before, you should continue with: >> >> (1) Have /usr/home/elars/dst/etc/fstab with: >> # Options Dump Pass >> 10.11.12.13:/usr/home/elars/dst/ / nfs ro 0 0 > > Done. > >> (2) From your loader, you need to export this environment variable, so >> that the kernel can get it with getenv(). You need at least: >> >> vfs.root.mountfrom=nfs:10.11.12.13:/usr/home/elars/dst > > Done. > >> Now, there are some other environment variables you need to export from the >> loader. >> >> boot.netif.ip >> boot.netif.netmask >> boot.netif.gateway >> boot.nfsroot.server >> boot.nfsroot.path > > Done. I also ripped out all the BOOTP* options from the kernel. > > However, this still fails: > > Trying to mount root from nfs:10.11.12.13:/usr/home/elars/dst []... > mountroot: waiting for device 10.11.12.13:/usr/home/elars/dst ... > Mounting from nfs:10.11.12.13:/usr/home/elars/dst failed with error 19. > > Loader variables: > vfs.root.mountfrom=nfs:10.11.12.13:/usr/home/elars/dst > > Manual root filesystem specification: > <fstype>:<device> [options] > Mount <device> using filesystem <fstype> > and with the specified (optional) option list. > > eg. ufs:/dev/da0s1a > zfs:tank > cd9660:/dev/acd0 ro > (which is equivalent to: mount -t cd9660 -o ro /dev/acd0 /) > > ? List valid disk boot devices > . Yield 1 second (for background tasks) > <empty line> Abort manual input > > mountroot> > > I did a tcpdump and no traffic shows up on the correct interface (em4). I guess I need to set yet another loader environment variable to indicate which interface I'd like to use. Looking at the source, I only see boot.netif.name, but setting that to em4 doesn't help either. > > Any further ideas? The interface doesn't have a name during loader stage. The kernel finds the interface to use based on the MAC address. You should set boot.netif.hwaddr as well in the kernel environment. -- Andre
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