/usr/share/initramfs-tools/scripts/nfs is in initramfs-tools 0.99ubuntu13.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | # NFS filesystem mounting -*- shell-script -*-
# FIXME This needs error checking
retry_nr=0
# parse nfs bootargs and mount nfs
do_nfsmount()
{
configure_networking
# get nfs root from dhcp
if [ "x${NFSROOT}" = "xauto" ]; then
# check if server ip is part of dhcp root-path
if [ "${ROOTPATH#*:}" = "${ROOTPATH}" ]; then
NFSROOT=${ROOTSERVER}:${ROOTPATH}
else
NFSROOT=${ROOTPATH}
fi
# nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]
elif [ -n "${NFSROOT}" ]; then
# nfs options are an optional arg
if [ "${NFSROOT#*,}" != "${NFSROOT}" ]; then
NFSOPTS="-o ${NFSROOT#*,}"
fi
NFSROOT=${NFSROOT%%,*}
if [ "${NFSROOT#*:}" = "$NFSROOT" ]; then
NFSROOT=${ROOTSERVER}:${NFSROOT}
fi
fi
if [ -z "${NFSOPTS}" ]; then
NFSOPTS="-o retrans=10"
fi
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-premount"
run_scripts /scripts/nfs-premount
[ "$quiet" != "y" ] && log_end_msg
if [ ${readonly} = y ]; then
roflag="-o ro"
else
roflag="-o rw"
fi
nfsmount -o nolock ${roflag} ${NFSOPTS} ${NFSROOT} ${rootmnt}
}
# NFS root mounting
mountroot()
{
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-top"
run_scripts /scripts/nfs-top
[ "$quiet" != "y" ] && log_end_msg
modprobe nfs
# For DHCP
modprobe af_packet
wait_for_udev 10
# Default delay is around 180s
delay=${ROOTDELAY:-180}
# loop until nfsmount succeeds
do_nfsmount
while [ ${retry_nr} -lt ${delay} ] && [ ! -e ${rootmnt}${init} ]; do
[ "$quiet" != "y" ] && log_begin_msg "Retrying nfs mount"
/bin/sleep 1
do_nfsmount
retry_nr=$(( ${retry_nr} + 1 ))
[ "$quiet" != "y" ] && log_end_msg
done
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-bottom"
run_scripts /scripts/nfs-bottom
[ "$quiet" != "y" ] && log_end_msg
}
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