export PERSISTENT
;;
- persistent=*)
- PERSISTENT="${ARGUMENT#persistent=}"
- if [ -z "${PERSISTENT}" ]
- then
- PERSISTENT="Yes"
- fi
- export PERSISTENT
+ persistent-encryption=*)
+ PERSISTENT_ENCRYPTION="${ARGUMENT#*=}"
+ export PERSISTENT_ENCRYPTION
;;
persistent-media=*)
PERSISTENT_MEDIA="${ARGUMENT#*=}"
export PERSISTENT_MEDIA
;;
+ persistent-method=*)
+ PERSISTENT_METHOD="${ARGUMENT#*=}"
+ export PERSISTENT_METHOD
+ ;;
persistent-path=*)
PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
export PERSISTENT_PATH
;;
+ persistent-read-only)
+ PERSISTENT_READONLY="Yes"
+ export PERSISTENT_READONLY
+ ;;
+
+ persistent-storage=*)
+ PERSISTENT_STORAGE="${ARGUMENT#persistent-storage=}"
+ export PERSISTENT_STORAGE
+ ;;
persistent-subtext=*)
root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
UNIONTYPE="aufs"
export UNIONTYPE
fi
+
+ if [ -z "${PERSISTENT_ENCRYPTION}" ]
+ then
+ PERSISTENT_ENCRYPTION="none"
+ export PERSISTENT_ENCRYPTION
+ elif echo ${PERSISTENT_ENCRYPTION} | grep -qw luks
+ then
+ if ! modprobe dm-crypt
+ then
+ log_warning_msg "Unable to load module dm-crypt"
+ PERSISTENT_ENCRYPTION=$(echo ${PERSISTENT_ENCRYPTION} | sed -e 's/\<luks,\|,\?luks$//g')
+ export PERSISTENT_ENCRYPTION
+ fi
+
+ if [ ! -x /lib/cryptsetup/askpass ] || [ ! -x /sbin/cryptsetup ]
+ then
+ log_warning_msg "cryptsetup in unavailable"
+ PERSISTENT_ENCRYPTION=$(echo ${PERSISTENT_ENCRYPTION} | sed -e 's/\<luks,\|,\?luks$//g')
+ export PERSISTENT_ENCRYPTION
+ fi
+ fi
+
+ if [ -n "${PERSISTENT}" ] && [ -z "${PERSISTENT_METHOD}" ]
+ then
+ PERSISTENT_METHOD="snapshot,overlay"
+ export PERSISTENT_METHOD
+ fi
+
+ if [ -n "${PERSISTENT}" ] && [ -z "${PERSISTENT_STORAGE}" ]
+ then
+ PERSISTENT_STORAGE="filesystem,file"
+ export PERSISTENT_STORAGE
+ fi
}
is_live_path ()
{
sysfs_path="${1#/sys}"
- if /lib/udev/path_id "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
+ if [ -e /lib/udev/path_id ]
+ then
+ # squeeze
+ PATH_ID="/lib/udev/path_id"
+ else
+ # wheezy/sid (udev >= 174)
+ PATH_ID="/sbin/udevadm test-builtin path_id"
+ fi
+
+ if "${PATH_ID}" "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
then
return 0
elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
fi
}
-find_snap ()
-{
- # Look for ${snap_label}.* in block devices
- snap_label="${1}"
- black_listed_devices="${2}"
- white_listed_devices="${3}"
-
- if [ "${PERSISTENT}" != "nofiles" ]
- then
- # search for image files
- snapdata=$(find_files "${PERSISTENT_PATH}${snap_label}.squashfs ${PERSISTENT_PATH}${snap_label}.cpio.gz ${PERSISTENT_PATH}${snap_label}.ext2 ${PERSISTENT_PATH}${snap_label}.ext3 ${PERSISTENT_PATH}${snap_label}.ext4 ${PERSISTENT_PATH}${snap_label}.jffs2" "${black_listed_devices}" "${white_listed_devices}")
- fi
-
- if [ -z "${snapdata}" ]
- then
- snapdata=$(find_cow_device "${snap_label}" "${black_listed_devices}" "${white_listed_devices}")
- fi
- echo "${snapdata}"
-}
-
try_snap ()
{
# copy the contents of previously found snapshot to ${snap_mount}
return 1
fi
- echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+ if [ -z ${PERSISTENT_READONLY} ]
+ then
+ echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+ fi
return 0
}
if [ "${UNIONTYPE}" = "aufs" ]
then
- roopt="rr"
+ roopt="rr+wh"
noxino_opt="noxino,"
elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
then
;;
esac
- # search for label and files (this could be hugely optimized)
- cowprobe=$(find_cow_device "${root_persistence}" "${blacklistdev}" "${whitelistdev}")
- if [ -b "${cowprobe}" ]
+ if echo ${PERSISTENT_METHOD} | grep -qw overlay
then
- # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
- # makes sense to have both persistence for /cow and /home mounted, maybe also with
- # snapshots to be sure to really store some e.g key config files,
- # but not on the same media
- blacklistdev="${cowprobe}"
- PERSISTENCE_IS_ON="1"
- export PERSISTENCE_IS_ON
+ overlays="${root_persistence} ${home_persistence}"
fi
- # homecow just mount something on /home, this should be generalized some way
- homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}" "${whitelistdev}")
- if [ -b "${homecow}" ]
+
+ if echo ${PERSISTENT_METHOD} | grep -qw snapshot
+ then
+ snapshots="${root_snapshot_label} ${home_snapshot_label}"
+ fi
+
+
+ for media in $(find_persistent_media "${overlays}" "${snapshots}" "${blacklistdev}" "${whitelistdev}")
+ do
+ media="$(echo ${media} | tr ":" " ")"
+ case ${media} in
+ ${root_persistence}=*)
+ cowprobe="${media#*=}"
+ ;;
+ ${home_persistence}=*)
+ homecow="${media#*=}"
+ ;;
+ ${root_snapshot_label}=*)
+ root_snapdata="${media#*=}"
+ ;;
+ ${home_snapshot_label}=*)
+ # This second type should be removed when snapshot will get smarter,
+ # hence when "/etc/live-snapshot*list" will be supported also by
+ # ext2|ext3|ext4|jffs2 snapshot types.
+ home_snapdata="${media#*=}"
+ ;;
+ *)
+ ;;
+ esac
+ done
+
+ if [ -b "${cowprobe}" ] || [ -b "${homecow}" ]
then
PERSISTENCE_IS_ON="1"
export PERSISTENCE_IS_ON
fi
- root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}" "${whitelistdev}")
- # This second type should be removed when snapshot will get smarter,
- # hence when "/etc/live-snapshot*list" will be supported also by
- # ext2|ext3|ext4|jffs2 snapshot types.
- home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}" "${whitelistdev}")
if [ -b "${cowprobe}" ]
then
fsck -y ${cowdevice}
fi
else
- log_warning_msg "Unable to find the persistent medium"
cowdevice="tmpfs"
cow_fstype="tmpfs"
cow_mountopt="rw,noatime,mode=755"