[projects/geninitrd.git] / mod-nfs.sh

#!/bin/sh
NFS_RCSID='$Revision$ $Date::                            $'

# geninitrd mod: nfs

# if we should init NFS at boot
have_nfs=no

# return true if node is nfs
# @param	string $node device node to be examined
# @access	public
is_nfs() {
	local node="$1"

	if is_yes "$(awk -vnode="$node" 'BEGIN { if (node ~ /^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:|\/dev\/nfs)/) print "yes" }')"; then
		return 0
	fi

	return 1
}

# find modules for for nfs
# @access	public
find_modules_nfs() {
	local devpath="$1"

	if [ ! -x /usr/bin/pcidev -a -z "$NFS_ETH_MODULES" ]; then
		die "root on NFS but /usr/bin/pcidev not found. Please install correct pci-database package and rerun $PROGRAM."
	fi

	if [ ! -f /proc/bus/pci/devices ]; then
		warn "Remember to add network card modules in /etc/sysconfig/geninitrd, example:"
		warn "BASICMODULES=\"e1000 ne2k-pci mii 8139too 3c59x\""
	else
		local m
		[ -z "$NFS_ETH_MODULES" ] && NFS_ETH_MODULES=$(/usr/bin/pcidev /m net | xargs)
		msg "NOTE: Network card(s) module(s) $NFS_ETH_MODULES is for this machine"
		for m in $NFS_ETH_MODULES; do
			find_module "$m"
		done
	fi
	find_module "-ipv4"
	find_module "nfs"

	have_nfs=yes
	warn "Remember to use \`root=/dev/ram0 init=/linuxrc' when starting kernel"
	warn "or you will have problems like init(xx) being child process of swapper(1)."
}

# generate initrd fragment
# @access	public
initrd_gen_nfs() {
	if ! is_yes "$have_nfs"; then
		return
	fi

	# use root=/dev/ram0 init=/linuxrc when starting kernel or you will
	# have problems like init(XX) being child process of swapper(1).
	debug "Adding rootfs on NFS support to initrd (dhcp)"
	mknod "$DESTDIR/dev/urandom" c 1 9
	mkdir "$DESTDIR/newroot"
	add_linuxrc <<-'EOF'
		ifconfig lo 127.0.0.1 up
		route add -net 127.0.0.0 mask 255.0.0.0 lo
		ifconfig eth0 up
		udhcpc -i eth0 -f -q -s /bin/setdhcp

		cd /newroot
		pivot_root . initrd
		[ -x /sbin/chroot ] && exec /sbin/chroot . /sbin/init -i < dev/console > dev/console 2>&1
	EOF

	cat <<-'EOF' > "$DESTDIR/bin/setdhcp"
		#!/bin/sh
		[ "$1" != "bound" ] && exit
		[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
		[ -n "$subnet" ] && NETMASK="netmask $subnet"
		ifconfig $interface $ip $BROADCAST $NETMASK up
		if [ -n "$router" ]; then
			for r in $router; do
				route add default gw $r dev $interface
			done
		fi

		if [ -n "$hostname" ]; then
			hostname $hostname
		fi

		for o in $CMDLINE; do
			case $o in
			nfsroot=*)
				rootpath=${o#nfsroot=}
				;;
			esac
		done

		if [ -n "$rootpath" ]; then
			mount -n -t nfs -o ro,nolock,posix,tcp,wsize=8192,rsize=8192 $rootpath /newroot
		else
			echo "Missing rootpath in what DHCP server sent to us. Failing..."
			echo "All seen variables are listed below:"
			set
		fi
	EOF

	chmod 755 "$DESTDIR/bin/setdhcp"
}
Commit	Line	Data
74d45ce1	1	#!/bin/sh
c34c6a69	2	NFS_RCSID='$Revision$ $Date:: $'
05c474b5	3
74d45ce1 ER	4	# geninitrd mod: nfs
	5
	6	# if we should init NFS at boot
	7	have_nfs=no
	8
	9	# return true if node is nfs
	10	# @param string $node device node to be examined
	11	# @access public
	12	is_nfs() {
	13	local node="$1"
	14
864391c7 ER	15	if is_yes "$(awk -vnode="$node" 'BEGIN { if (node ~ /^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:\|\/dev\/nfs)/) print "yes" }')"; then
864391c7 ER	16	return 0
74d45ce1 ER	17	fi
74d45ce1 ER	18
864391c7	19	return 1
74d45ce1 ER	20	}
	21
	22	# find modules for for nfs
	23	# @access public
	24	find_modules_nfs() {
	25	local devpath="$1"
	26
	27	if [ ! -x /usr/bin/pcidev -a -z "$NFS_ETH_MODULES" ]; then
	28	die "root on NFS but /usr/bin/pcidev not found. Please install correct pci-database package and rerun $PROGRAM."
	29	fi
	30
	31	if [ ! -f /proc/bus/pci/devices ]; then
	32	warn "Remember to add network card modules in /etc/sysconfig/geninitrd, example:"
	33	warn "BASICMODULES=\"e1000 ne2k-pci mii 8139too 3c59x\""
	34	else
	35	local m
	36	[ -z "$NFS_ETH_MODULES" ] && NFS_ETH_MODULES=$(/usr/bin/pcidev /m net \| xargs)
864391c7	37	msg "NOTE: Network card(s) module(s) $NFS_ETH_MODULES is for this machine"
74d45ce1 ER	38	for m in $NFS_ETH_MODULES; do
	39	find_module "$m"
	40	done
	41	fi
	42	find_module "-ipv4"
	43	find_module "nfs"
	44
	45	have_nfs=yes
	46	warn "Remember to use \`root=/dev/ram0 init=/linuxrc' when starting kernel"
	47	warn "or you will have problems like init(xx) being child process of swapper(1)."
	48	}
	49
	50	# generate initrd fragment
	51	# @access public
	52	initrd_gen_nfs() {
1b481849 ER	53	if ! is_yes "$have_nfs"; then
	54	return
	55	fi
	56
74d45ce1 ER	57	# use root=/dev/ram0 init=/linuxrc when starting kernel or you will
	58	# have problems like init(XX) being child process of swapper(1).
	59	debug "Adding rootfs on NFS support to initrd (dhcp)"
	60	mknod "$DESTDIR/dev/urandom" c 1 9
	61	mkdir "$DESTDIR/newroot"
	62	add_linuxrc <<-'EOF'
	63	ifconfig lo 127.0.0.1 up
	64	route add -net 127.0.0.0 mask 255.0.0.0 lo
	65	ifconfig eth0 up
	66	udhcpc -i eth0 -f -q -s /bin/setdhcp
	67
	68	cd /newroot
	69	pivot_root . initrd
	70	[ -x /sbin/chroot ] && exec /sbin/chroot . /sbin/init -i < dev/console > dev/console 2>&1
74d45ce1 ER	71	EOF
	72
	73	cat <<-'EOF' > "$DESTDIR/bin/setdhcp"
	74	#!/bin/sh
	75	[ "$1" != "bound" ] && exit
	76	[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
	77	[ -n "$subnet" ] && NETMASK="netmask $subnet"
	78	ifconfig $interface $ip $BROADCAST $NETMASK up
	79	if [ -n "$router" ]; then
	80	for r in $router; do
	81	route add default gw $r dev $interface
	82	done
	83	fi
	84
736620da	85	if [ -n "$hostname" ]; then
d14a228d	86	hostname $hostname
	87	fi
	88
74d45ce1 ER	89	for o in $CMDLINE; do
	90	case $o in
	91	nfsroot=*)
	92	rootpath=${o#nfsroot=}
	93	;;
	94	esac
	95	done
	96
	97	if [ -n "$rootpath" ]; then
	98	mount -n -t nfs -o ro,nolock,posix,tcp,wsize=8192,rsize=8192 $rootpath /newroot
	99	else
	100	echo "Missing rootpath in what DHCP server sent to us. Failing..."
	101	echo "All seen variables are listed below:"
	102	set
	103	fi
	104	EOF
	105
	106	chmod 755 "$DESTDIR/bin/setdhcp"
	107	}