live-initramfs with NFSROOT=auto

[fboiteux at calistel.com (Frédéric BOITEUX)]

	Hello,

  I'm trying to update my FAI (automatic install) with version 3.2,
which now use Debian kernels and live-initramfs. I'm using net boot
with PXE and NFS, and tried to find the correct arguments to give on
linux command line. I've tried following options :
initrd=<my-initrd> debug boot=live netboot=nfs NFSOPTS="-o udp" vga=791 <FAI options>
but it fails because the NFS server and root path isn't explicitely
given by 'nfsroot=<server>:<rootpath>' argument.
It should work as these parameters are already given by DHCP and
initramfs' NFSROOT option is set to 'auto', but I've found in
scripts/live that these data from DHCP is read too late :

do_netmount ()
{
 	...

        ipconfig ${DEVICE} | tee /netboot.config

        if [ "${NFSROOT}" = "auto" ]
        then
                NFSROOT=${ROOTSERVER}:${ROOTPATH}
        fi

        # source relevant ipconfig output
        OLDHOSTNAME=$HOSTNAME
        . /tmp/net-${DEVICE}.conf

...
}

I think it should read /tmp/net-${DEVICE}.conf script (which contains
definitions from DHCP lease) *before* setting NFSROOT to real values
when it is 'auto' ?

I found a script in my initrd, scripts/nfs (coming from FAI ?) which do
it that way :

do_nfsmount()
{
        # support ip options see linux sources Documentation/nfsroot.txt
        case ${IPOPTS} in
                none|off)
                        # Do nothing
                        ;;
                ""|on|any)
                        # Bring up device
                        ipconfig ${DEVICE}
                        ;;
                dhcp|bootp|rarp|both)
                        ipconfig -c ${IPOPTS} -d ${DEVICE}
                        ;;
                *)
                        ipconfig -d $IPOPTS

                        ...
                        ;;
        esac

        # source relevant ipconfig output
        . /tmp/net-${DEVICE}.conf

        # get nfs root from dhcp
        if [ "x${NFSROOT}" = "xauto" ]; then
                NFSROOT=${ROOTSERVER}:${ROOTPATH}
        # nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]
	...
}

If you agree, can you correct live-initramfs's script ?

	with regards,
		Fred.