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-rwxr-xr-xdev-tools/prepare-persistent-disks211
1 files changed, 211 insertions, 0 deletions
diff --git a/dev-tools/prepare-persistent-disks b/dev-tools/prepare-persistent-disks
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+#!/bin/bash
+###############################################################################
+# GLOBALS
+#
+
+# flag file containing pids of running instances for concurrency checks
+declare -rg OPENSLX_DISK_FLAG="/tmp/openslx.disk"
+# file that will contain the name of the device used for the /tmp partition
+# - label 'OPENSLX_TMP' in GPT / type '0x44' in MBR
+declare -rg OPENSLX_TMP_MARKER="/tmp/openslx.disk.tmp"
+# file that will contain the name of the device used for storing qcow2
+# - label 'OPENSLX_SYS' in GPT / type '0x46' in MBR
+declare -rg OPENSLX_SYS_MARKER="/tmp/openslx.disk.sys"
+# mount point for system partition
+declare -rg OPENSLX_SYS_MOUNT="/opt/openslx/system"
+
+#
+# END GLOBALS
+###############################################################################
+
+###############################################################################
+# FUNCTION DEFINITIONS
+#
+# helper to mount the OPENSLX_SYS partition to /opt/openslx/system
+# Usage: mount_sys_part <path_to_sys_partition>
+mount_sys_part() {
+ if [ ! -b "$1" ]; then
+ warn "($$) Refusing to mount '$1' as its not a block device!"
+ return 1
+ fi
+
+ local OPENSLX_SYS_DEVICE="$1"
+ mkdir -p ${OPENSLX_SYS_MOUNT}
+ if ! mount -t auto "${OPENSLX_SYS_DEVICE}" "${OPENSLX_SYS_MOUNT}"; then
+ warn "($$) Mounting '${OPENSLX_SYS_DEVICE}' to '${OPENSLX_SYS_MOUNT}' failed."
+ return 1
+ fi
+ return 0
+
+}
+#
+# generic helper to format the given partition with the given filesystem or
+# from the prefdefined list of xfs, ext4, ...
+# Usage: format_disk <dev> <fs>
+# e.g. format_disk /dev/sda1 xfs
+format_disk () {
+ local TARGET_DEVICE="$1"
+ local fslist="xfs ext4"
+ # if we have a second arguments, its the filesystem of choice
+ local fs
+ [ $# -ge 2 ] && fslist="$2"
+ for fs in $fslist ; do
+ unset found
+ local MKFS="$(busybox which mkfs.$fs)"
+ if [ -n $MKFS ]; then
+ found=yes
+ case "mkfs.$fs" in
+ mkfs.xfs) fopt="-fq" ;;
+ mkfs.ext4) fopt="-Fq" ;;
+ esac
+ info "($$) Formatting $TARGET_DEVICE as $fs"
+ return $(${MKFS} ${fopt} "${TARGET_DEVICE}")
+ fi
+ [ -n "$found" ] && break
+ done
+ # still here? then we didn't find a proper formatter...
+ warn "($$) Could not format $PART_DEV as $fs."
+ return 1
+}
+
+#
+# END FUNCTION DEFINITIONS
+###############################################################################
+
+###############################################################################
+# MAIN CODE
+#
+
+command -v warn >/dev/null || . /lib/dracut-lib.sh
+
+# let check the arguments
+if [ "$#" -ne 2 ]; then
+ warn "($$) '$0' need 2 arguments: '$0 [OPENSLX_SYS|OPENSLX_TMP] <dev_path>'"
+ exit 1
+fi
+# $1 sane?
+if [ "x$1" != "xOPENSLX_SYS" ] && [ "x$1" != "xOPENSLX_TMP" ]; then
+ warn "($$) First arg needs to be either 'OPENSLX_SYS' or 'OPENSLX_TMP', given: $1"
+ exit 1
+fi
+# $2 sane?
+if [ ! -b "/dev/$2" ]; then
+ warn "($$) Second arg appears not to be a block device!"
+ exit 1
+fi
+
+# ok all seems well, set the arguments
+PART_TYPE="$1"
+PART_DEV="/dev/$2"
+
+unset OPENSLX_TMP_DEVICE
+unset OPENSLX_SYS_DEVICE
+
+# lets check if we are already running
+INSTANCES="$(grep "$PART_TYPE" "$OPENSLX_DISK_FLAG" | busybox wc -l)"
+if [ "$INSTANCES" -ge 1 ]; then
+ # uhoh we are not alone! Need to check
+ # if the other instance actually did its job
+ warn "($$) '$0' already running for $PART_TYPE on $PART_DEV... checking state."
+ # here two/three cases depending on which PART_TYPE we are
+ # currently processing.
+ for timeout in 1 1 2; do
+ # always give the other instance time to finish
+ # but only check 3 times overall
+ sleep $timeout
+ case "$PART_TYPE" in
+ OPENSLX_TMP)
+ # was the tmp partition marker created with a device?
+ if [ ! -f "${OPENSLX_TMP_MARKER}" ]; then
+ info "($$) Invalid state: no marker for $PART_TYPE"
+ continue
+ fi
+ # it was, is it a valid block device?
+ OPENSLX_TMP_DEVICE="$(cat ${OPENSLX_TMP_MARKER})"
+ if [ -z $OPENSLX_TMP_DEVICE -o ! -b $OPENSLX_TMP_DEVICE ]; then
+ info "($$) Invalid state: no for device $OPENSLX_TMP_DEVICE"
+ continue
+ fi
+ # its detected, its a block device and as mounting is
+ # done later, we can not check for more at this point
+ info "($$) Valid state for $OPENSLX_TMP_DEVICE as $PART_TYPE"
+ exit 0
+ ;;
+ OPENSLX_SYS)
+ # was the system partition marker created with a device?
+ if [ ! -f "${OPENSLX_SYS_MARKER}" ]; then
+ info "($$) Invalid state: no marker for $PART_TYPE"
+ continue
+ fi
+ # it was, is it a valid block device?
+ OPENSLX_SYS_DEVICE="$(cat ${OPENSLX_SYS_MARKER})"
+ if [ -z $OPENSLX_SYS_DEVICE -o ! -b $OPENSLX_SYS_DEVICE ]; then
+ info "($$) Invalid state: no for device $OPENSLX_SYS_DEVICE"
+ continue
+ fi
+ # its detected, its a block device, is it mounted?
+ if mount | grep -qE "^$OPENSLX_SYS_DEVICE\ on $OPENSLX_SYS_MOUNT"; then
+ info "($$) Valid state for $OPENSLX_SYS_DEVICE as $PART_TYPE"
+ exit 0
+ fi
+ # if its not mounted, we want to keep on, so no exit!
+ ;;
+ *)
+ # weird case which should never happen
+ warn "($$) If you see this, then $0 was called with a bad PART_TYPE: $@"
+ continue
+ ;;
+ esac
+ done
+ warn "($$) Timeout reached!"
+ warn "($$) '$PART_TYPE' was found but not device was associated to it!"
+fi
+
+# We write our pid to $OPENSLX_DISK_FLAG in order to make sure
+# we are the only instance of this script running.
+info "($$) Processing: $PART_TYPE -> $PART_DEV ($$)"
+echo "$PART_TYPE.$$" >> "$OPENSLX_DISK_FLAG"
+
+# if we are still here, then we can go on and process the partition
+if [ "$PART_TYPE" = "OPENSLX_TMP" ]; then
+ # always format /tmp partition
+ if ! format_disk "${PART_DEV}" xfs; then
+ # error while formatting, cleanup
+ warn "($$) Error formatting $PART_DEV ... removing $$"
+ sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
+ exit 1
+ fi
+ info "($$) Using '$PART_DEV' as '$PART_TYPE'"
+ # mark it for later: in pre-pivot we will check this file
+ # and mount it as $NEWROOT/tmp
+ echo "$PART_DEV" > "$OPENSLX_TMP_MARKER"
+ # remove our pid from OPENSLX_DISK_FLAG
+ sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
+ exit 0
+fi
+if [ "$PART_TYPE" = "OPENSLX_SYS" ]; then
+ # TODO make the formatting of the system partition configurable
+ if ! format_disk "${PART_DEV}" xfs; then
+ # error while formatting, cleanup
+ warn "($$) Error formatting $PART_DEV ... removing $$"
+ sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
+ exit 1
+ fi
+ # mark it
+ # mount it now, since qemu-nbd needs it asap!
+ if mount_sys_part "$PART_DEV"; then
+ # mount worked, mark it as done
+ info "($$) Using '$PART_DEV' as '$PART_TYPE'"
+ echo "$PART_DEV" > "$OPENSLX_SYS_MARKER"
+ sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
+ exit 0
+ else
+ warn "($$) 'mount_sys_part' failed in $0"
+ sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
+ exit 1
+ fi
+fi
+
+#
+# END MAIN CODE
+###############################################################################