diff options
Diffstat (limited to 'scripts/local')
| -rw-r--r-- | scripts/local | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/scripts/local b/scripts/local new file mode 100644 index 0000000..a103e68 --- /dev/null +++ b/scripts/local @@ -0,0 +1,234 @@ +# Local filesystem mounting -*- shell-script -*- + +local_top() +{ + if [ "${local_top_used}" != "yes" ]; then + [ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-top" + run_scripts /scripts/local-top + [ "$quiet" != "y" ] && log_end_msg + fi + local_top_used=yes + + # Start time for measuring elapsed time in local_device_setup + if [ -z "${local_top_time}" ]; then + local_top_time="$(cat /proc/uptime)" + local_top_time="${local_top_time%%[. ]*}" + local_top_time=$((local_top_time + 1)) # round up + export local_top_time + fi +} + +local_block() +{ + [ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-block" + run_scripts /scripts/local-block "$@" + [ "$quiet" != "y" ] && log_end_msg +} + +local_premount() +{ + if [ "${local_premount_used}" != "yes" ]; then + [ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-premount" + run_scripts /scripts/local-premount + [ "$quiet" != "y" ] && log_end_msg + fi + local_premount_used=yes +} + +local_bottom() +{ + if [ "${local_premount_used}" = "yes" ] || [ "${local_top_used}" = "yes" ]; then + [ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-bottom" + run_scripts /scripts/local-bottom + [ "$quiet" != "y" ] && log_end_msg + fi + local_premount_used=no + local_top_used=no + unset local_top_time +} + +# $1=device ID to mount +# $2=optionname (for root and etc) +# $3=panic if device is missing (true or false, default: true) +# Sets $DEV to the resolved device node +local_device_setup() +{ + local dev_id="$1" + local name="$2" + local may_panic="${3:-true}" + local real_dev + local time_elapsed + local count + + wait_for_udev 10 + + # Load ubi with the correct MTD partition and return since fstype + # doesn't work with a char device like ubi. + if [ -n "$UBIMTD" ]; then + modprobe ubi "mtd=$UBIMTD" + DEV="${dev_id}" + return + fi + + # Don't wait for a device that doesn't have a corresponding + # device in /dev and isn't resolvable by blkid (e.g. mtd0) + if [ "${dev_id#/dev}" = "${dev_id}" ] && + [ "${dev_id#*=}" = "${dev_id}" ]; then + DEV="${dev_id}" + return + fi + + # If the root device hasn't shown up yet, give it a little while + # to allow for asynchronous device discovery (e.g. USB). We + # also need to keep invoking the local-block scripts in case + # there are devices stacked on top of those. + if ! real_dev=$(resolve_device "${dev_id}") || + ! get_fstype "${real_dev}" >/dev/null; then + log_begin_msg "Waiting for ${name}" + + # Timeout is max(30, rootdelay) seconds (approximately) + slumber=30 + if [ "${ROOTDELAY:-0}" -gt $slumber ]; then + slumber=$ROOTDELAY + fi + + while true; do + sleep 1 + time_elapsed="$(cat /proc/uptime)" + time_elapsed="${time_elapsed%%[. ]*}" + time_elapsed=$((time_elapsed - local_top_time)) + + local_block "${dev_id}" + + # If mdadm's local-block script counts the + # number of times it is run, make sure to + # run it the expected number of times. + while true; do + if [ -f /run/count.mdadm.initrd ]; then + count="$(cat /run/count.mdadm.initrd)" + elif [ -n "${count}" ]; then + # mdadm script deleted it; put it back + count=$((count + 1)) + echo "${count}" >/run/count.mdadm.initrd + else + break + fi + if [ ${count} -ge ${time_elapsed} ]; then + break; + fi + /scripts/local-block/mdadm "${dev_id}" + done + + if real_dev=$(resolve_device "${dev_id}") && + get_fstype "${real_dev}" >/dev/null; then + wait_for_udev 10 + log_end_msg 0 + break + fi + if [ ${time_elapsed} -ge "${slumber}" ]; then + log_end_msg 1 || true + break + fi + done + fi + + # We've given up, but we'll let the user fix matters if they can + while ! real_dev=$(resolve_device "${dev_id}") || + ! get_fstype "${real_dev}" >/dev/null; do + if ! $may_panic; then + echo "Gave up waiting for ${name}" + return 1 + fi + echo "Gave up waiting for ${name} device. Common problems:" + echo " - Boot args (cat /proc/cmdline)" + echo " - Check rootdelay= (did the system wait long enough?)" + if [ "${name}" = root ]; then + echo " - Check root= (did the system wait for the right device?)" + fi + echo " - Missing modules (cat /proc/modules; ls /dev)" + panic "ALERT! ${dev_id} does not exist. Dropping to a shell!" + done + + DEV="${real_dev}" +} + +local_mount_root() +{ + local_top + if [ -z "${ROOT}" ]; then + panic "No root device specified. Boot arguments must include a root= parameter." + fi + local_device_setup "${ROOT}" "root file system" + ROOT="${DEV}" + + # Get the root filesystem type if not set + if [ -z "${ROOTFSTYPE}" ] || [ "${ROOTFSTYPE}" = auto ]; then + FSTYPE=$(get_fstype "${ROOT}") + else + FSTYPE=${ROOTFSTYPE} + fi + + local_premount + + if [ "${readonly?}" = "y" ]; then + roflag=-r + else + roflag=-w + fi + + checkfs "${ROOT}" root "${FSTYPE}" + + # Mount root + # shellcheck disable=SC2086 + if ! mount ${roflag} ${FSTYPE:+-t "${FSTYPE}"} ${ROOTFLAGS} "${ROOT}" "${rootmnt?}"; then + panic "Failed to mount ${ROOT} as root file system." + fi +} + +local_mount_fs() +{ + read_fstab_entry "$1" + + local_device_setup "$MNT_FSNAME" "$1 file system" + MNT_FSNAME="${DEV}" + + local_premount + + if [ "${readonly}" = "y" ]; then + roflag=-r + else + roflag=-w + fi + + if [ "$MNT_PASS" != 0 ]; then + checkfs "$MNT_FSNAME" "$MNT_DIR" "${MNT_TYPE}" + fi + + # Mount filesystem + if ! mount ${roflag} -t "${MNT_TYPE}" -o "${MNT_OPTS}" "$MNT_FSNAME" "${rootmnt}${MNT_DIR}"; then + panic "Failed to mount ${MNT_FSNAME} as $MNT_DIR file system." + fi +} + +mountroot() +{ + local_mount_root +} + +mount_top() +{ + # Note, also called directly in case it's overridden. + local_top +} + +mount_premount() +{ + # Note, also called directly in case it's overridden. + local_premount +} + +mount_bottom() +{ + # Note, also called directly in case it's overridden. + local_bottom +} |