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# NFS filesystem mounting -*- shell-script -*-
# FIXME This needs error checking
nfs_top()
{
if [ "${nfs_top_used}" != "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/nfs-top"
run_scripts /scripts/nfs-top
[ "$quiet" != "y" ] && log_end_msg
fi
nfs_top_used=yes
}
nfs_premount()
{
if [ "${nfs_premount_used}" != "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/nfs-premount"
run_scripts /scripts/nfs-premount
[ "$quiet" != "y" ] && log_end_msg
fi
nfs_premount_used=yes
}
nfs_bottom()
{
if [ "${nfs_premount_used}" = "yes" ] || [ "${nfs_top_used}" = "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/nfs-bottom"
run_scripts /scripts/nfs-bottom
[ "$quiet" != "y" ] && log_end_msg
fi
nfs_premount_used=no
nfs_top_used=no
}
# parse nfs bootargs and mount nfs
nfs_mount_root_impl()
{
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 "${NFSOPTS}" ]; then
NFSOPTS="-o retrans=10"
fi
nfs_premount
if [ "${readonly?}" = y ]; then
roflag="-o ro"
else
roflag="-o rw"
fi
# shellcheck disable=SC2086
nfsmount -o nolock ${roflag} ${NFSOPTS} "${NFSROOT}" "${rootmnt?}"
}
# NFS root mounting
nfs_mount_root()
{
nfs_top
# For DHCP
modprobe af_packet
wait_for_udev 10
# Default delay is around 180s
delay=${ROOTDELAY:-180}
# loop until nfsmount succeeds
nfs_mount_root_impl
ret=$?
nfs_retry_count=0
while [ ${nfs_retry_count} -lt "${delay}" ] \
&& [ $ret -ne 0 ] ; do
[ "$quiet" != "y" ] && log_begin_msg "Retrying nfs mount"
sleep 1
nfs_mount_root_impl
ret=$?
nfs_retry_count=$(( nfs_retry_count + 1 ))
[ "$quiet" != "y" ] && log_end_msg
done
}
nfs_mount_fs_impl()
{
configure_networking
if [ -z "${NFSOPTS}" ]; then
NFSOPTS="-o retrans=10"
fi
nfs_premount
if [ "${readonly}" = y ]; then
roflag="-o ro"
else
roflag="-o rw"
fi
read_fstab_entry "$1"
# shellcheck disable=SC2086
nfsmount ${roflag} ${NFSOPTS} -o "${MNT_OPTS}" "$MNT_FSNAME" "${rootmnt}${MNT_DIR}"
}
nfs_mount_fs()
{
nfs_top
# For DHCP
modprobe af_packet
wait_for_udev 10
# Default delay is around 180s
delay=${ROOTDELAY:-180}
# Don't loop here; we can't sanely check if it worked like for
# the rootfs or /etc.
nfs_mount_fs_impl "$1"
}
mountroot()
{
nfs_mount_root
}
mount_top()
{
# Note, also called directly in case it's overridden.
nfs_top
}
mount_premount()
{
# Note, also called directly in case it's overridden.
nfs_premount
}
mount_bottom()
{
# Note, also called directly in case it's overridden.
nfs_bottom
}
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