/usr/share/tcos/scripts/tcos-top/20mountnfs is in initramfs-tools-tcos 0.89.86.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
if [ "$1" = "prereqs" ]; then
exit 0
fi
. /scripts/functions
. /conf/tcos.conf
. /conf/tcos-run-functions
quiet=n
# if break=mountnfs STOP here
maybe_break mountnfs
# read /tmp/less_ram
if [ "$(cat /tmp/less_ram)" = "0" ]; then
# have more than TCOS_MIN_RAM
exit 0
fi
# if use NFS try to mount:
#
# SERVER_IP:/var/lib/tcos/fs-$(uname -r)
#
MNTOPT="ro,nolock,rsize=2048,wsize=2048,retrans=10"
NFS_RO=/mnt/nfs
NFS_RW=/root
mkdir -p /root
mkdir -p /mnt/nfs
# NFS or NBD ?
NFS_MODE=$(read_cmdline_var "nfsmode" "nfs")
if [ "${NFS_MODE}" = "nbd" ]; then
# mount root-$(uname -r).squashfs as /dev/nbd0
log_begin_msg "Mounting remote squashfs with NBD"
NBD_PORT=$(read_cmdline_var "nbdport" "2001")
# load 1 nbd devices
modprobe nbd nbds_max=1
# wait for device
while [ ! -e /dev/nbd0 ]; do
sleep 1
done
nbd-client tcos-server $NBD_PORT /dev/nbd0
sleep 1
mount /dev/nbd0 /mnt/nfs
log_end_msg $?
else
log_begin_msg "Trying to mount NFS"
nfsmount -o $MNTOPT $(read_server "nfs-server"):${TCOS_VAR}/fs-$(uname -r) ${NFS_RO} 2>/dev/null
# try again
if [ $? -ne 0 ]; then
log_begin_msg "Second retry to mount NFS"
nfsmount -o $MNTOPT $(read_server "nfs-server"):${TCOS_VAR}/fs-$(uname -r) ${NFS_RO} 2> /dev/null
fi
if [ $? -ne 0 ]; then
panic "Unable to mount NFS, check NFS service in server and ${TCOS_VAR}/fs-$(uname -r) dir"
fi
log_end_msg $?
fi # end of NFS_MODE
# remount /root in RW mode
log_begin_msg "Remounting root in RW mode"
mkdir -p /mnt/ram
mount -t tmpfs -o size=5m tmpfs /mnt/ram
if [ $(grep -c unionfs /proc/modules) = 0 ] && [ $(grep -c aufs /proc/modules) != 0 ]; then
mount -t aufs -o br:/mnt/ram:/mnt/nfs none /root >> /tmp/initramfs.debug 2>&1
else
# NFS mounts must have nfsro instead of ro (see man unionfs) with kernel < 2.6.22
if [ "$(uname -r| awk -F"[.|-]" '{print $3}')" -lt 22 ] && [ "${NFS_MODE}" != "nbd" ] ; then
mount -t unionfs -o dirs=/mnt/ram=rw:/mnt/nfs=nfsro unionfs /root
else
mount -t unionfs -o dirs=/mnt/ram=rw:/mnt/nfs=ro unionfs /root
fi
fi
log_end_msg $?
maybe_break move_mnt
# Set browseable NFS and RAM dirs
mkdir -p /root/.dirs/nfs
mkdir -p /root/.dirs/ram
mount -o move /mnt/nfs /root/.dirs/nfs
mount -o move /mnt/ram /root/.dirs/ram
exit 0
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