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

#!/bin/sh
# 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).
	verbose "Adding rootfs on NFS support to initrd (dhcp)"
	mknod -m 644 "$DESTDIR/dev/urandom" c 1 9
	mkdir "$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
74d45ce1 ER	2	# geninitrd mod: nfs
	3
	4	# if we should init NFS at boot
	5	have_nfs=no
	6
	7	# return true if node is nfs
	8	# @param string $node device node to be examined
	9	# @access public
	10	is_nfs() {
	11	local node="$1"
	12
864391c7 ER	13	if is_yes "$(awk -vnode="$node" 'BEGIN { if (node ~ /^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:\|\/dev\/nfs)/) print "yes" }')"; then
864391c7 ER	14	return 0
74d45ce1 ER	15	fi
74d45ce1 ER	16
864391c7	17	return 1
74d45ce1 ER	18	}
	19
	20	# find modules for for nfs
	21	# @access public
	22	find_modules_nfs() {
	23	local devpath="$1"
	24
	25	if [ ! -x /usr/bin/pcidev -a -z "$NFS_ETH_MODULES" ]; then
	26	die "root on NFS but /usr/bin/pcidev not found. Please install correct pci-database package and rerun $PROGRAM."
	27	fi
	28
	29	if [ ! -f /proc/bus/pci/devices ]; then
	30	warn "Remember to add network card modules in /etc/sysconfig/geninitrd, example:"
	31	warn "BASICMODULES=\"e1000 ne2k-pci mii 8139too 3c59x\""
	32	else
	33	local m
	34	[ -z "$NFS_ETH_MODULES" ] && NFS_ETH_MODULES=$(/usr/bin/pcidev /m net \| xargs)
864391c7	35	msg "NOTE: Network card(s) module(s) $NFS_ETH_MODULES is for this machine"
74d45ce1 ER	36	for m in $NFS_ETH_MODULES; do
	37	find_module "$m"
	38	done
	39	fi
	40	find_module "-ipv4"
	41	find_module "nfs"
	42
	43	have_nfs=yes
	44	warn "Remember to use \`root=/dev/ram0 init=/linuxrc' when starting kernel"
	45	warn "or you will have problems like init(xx) being child process of swapper(1)."
	46	}
	47
	48	# generate initrd fragment
	49	# @access public
	50	initrd_gen_nfs() {
1b481849 ER	51	if ! is_yes "$have_nfs"; then
	52	return
	53	fi
	54
74d45ce1 ER	55	# use root=/dev/ram0 init=/linuxrc when starting kernel or you will
74d45ce1 ER	56	# have problems like init(XX) being child process of swapper(1).
02ba8ab7	57	verbose "Adding rootfs on NFS support to initrd (dhcp)"
6b45dd6c	58	mknod -m 644 "$DESTDIR/dev/urandom" c 1 9
74d45ce1 ER	59	mkdir "$DESTDIR/newroot"
	60	add_linuxrc <<-'EOF'
	61	ifconfig lo 127.0.0.1 up
	62	route add -net 127.0.0.0 mask 255.0.0.0 lo
	63	ifconfig eth0 up
	64	udhcpc -i eth0 -f -q -s /bin/setdhcp
	65
	66	cd /newroot
	67	pivot_root . initrd
	68	[ -x /sbin/chroot ] && exec /sbin/chroot . /sbin/init -i < dev/console > dev/console 2>&1
74d45ce1 ER	69	EOF
	70
	71	cat <<-'EOF' > "$DESTDIR/bin/setdhcp"
	72	#!/bin/sh
	73	[ "$1" != "bound" ] && exit
	74	[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
	75	[ -n "$subnet" ] && NETMASK="netmask $subnet"
	76	ifconfig $interface $ip $BROADCAST $NETMASK up
	77	if [ -n "$router" ]; then
	78	for r in $router; do
	79	route add default gw $r dev $interface
	80	done
	81	fi
	82
736620da	83	if [ -n "$hostname" ]; then
d14a228d	84	hostname $hostname
	85	fi
	86
74d45ce1 ER	87	for o in $CMDLINE; do
	88	case $o in
	89	nfsroot=*)
	90	rootpath=${o#nfsroot=}
	91	;;
	92	esac
	93	done
	94
	95	if [ -n "$rootpath" ]; then
	96	mount -n -t nfs -o ro,nolock,posix,tcp,wsize=8192,rsize=8192 $rootpath /newroot
	97	else
	98	echo "Missing rootpath in what DHCP server sent to us. Failing..."
	99	echo "All seen variables are listed below:"
	100	set
	101	fi
	102	EOF
	103
	104	chmod 755 "$DESTDIR/bin/setdhcp"
	105	}