[PATCH 33/33] nfs: Add ip=... and root=nfs... parameters to internal dracut

Thomas Renninger
2014-11-20T14:57:08Z

cmdline

If the rootfs is an nfs mount, also know as nfsroot, add the correct
parameter to the dracut cmdline.

Signed-off-by: Thomas Renninger <trenn-l3A5Bk7waGM@public.gmane.org>
---
modules.d/95nfs/module-setup.sh | 46 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/modules.d/95nfs/module-setup.sh b/modules.d/95nfs/module-setup.sh
index e1340b3..41c6ef7 100755
--- a/modules.d/95nfs/module-setup.sh
+++ b/modules.d/95nfs/module-setup.sh
@@ -14,7 +14,6 @@ check() {
done
return 255
}
-
return 0
}

@@ -29,14 +28,56 @@ installkernel() {
instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl nfs_layout_nfsv41_files
}

+cmdline() {
+ local nfs_device
+ local nfs_options
+ local nfs_root
+ local nfs_address
+ local lookup
+ local ifname
+
+ ### nfsroot= ###
+ nfs_device=$(findmnt -t nfs4 -n -o SOURCE /)
+ if [ -n "$nfs_device" ];then
+ nfs_root="root=nfs4:$nfs_device"
+ else
+ nfs_device=$(findmnt -t nfs -n -o SOURCE /)
+ [ -z "$nfs_device" ] && return
+ nfs_root="root=nfs:$nfs_device"
+ fi
+ nfs_options=$(findmnt -t nfs4,nfs -n -o OPTIONS /)
+ [ -n "$nfs_options" ] && nfs_root="$nfs_root:$nfs_options"
+ echo "$nfs_root"
+
+ ### ip= ###
+ if [[ $nfs_device = [0-9]*\.[0-9]*\.[0-9]*.[0-9]* ]] || [[ $nfs_device = \[.*\] ]]; then
+ nfs_address="$nfs_device"
+ else
+ lookup=$(host $(echo ${nfs_device%%:*})| head -n1)
+ nfs_address=${lookup##* }
+ fi
+ ifname=$(ip -o route get to $nfs_address | sed -n 's/.*dev \([^ ]*\).*/\1/p')
+ if [ -e /sys/class/net/$ifname/address ] ; then
+ ifmac=$(cat /sys/class/net/$ifname/address)
+ printf 'ifname=%s:%s ' ${ifname} ${ifmac}
+ fi
+
+ printf 'ip=%s:static\n' ${ifname}
+}
+
# called by dracut
install() {
local _i
local _nsslibs
inst_multiple -o portmap rpcbind rpc.statd mount.nfs \
- mount.nfs4 umount rpc.idmapd sed /etc/netconfig
+ mount.nfs4 umount rpc.idmapd sed /etc/netconfig host sed
inst_multiple /etc/services /etc/nsswitch.conf /etc/rpc /etc/protocols /etc/idmapd.conf

+ if [[ $hostonly_cmdline == "yes" ]]; then
+ local _netconf="$(cmdline)"
+ [[ $_netconf ]] && printf "%s\n" "$_netconf" >> "${initdir}/etc/cmdline.d/95nfs.conf"
+ fi
+
if [ -f /lib/modprobe.d/nfs.conf ]; then
inst_multiple /lib/modprobe.d/nfs.conf
else
@@ -75,4 +116,3 @@ install() {
&& chown rpc.rpc "$initdir/var/lib/rpcbind"
dracut_need_initqueue
}
-
--
1.8.5.2