9990-misc-helpers.sh: fix RAID detection for findiso.
[live-boot-grml.git] / components / 9990-misc-helpers.sh
index 7994ecd..1267a67 100755 (executable)
@@ -15,6 +15,42 @@ is_live_path()
        return 1
 }
 
+grml_match_bootid()
+{
+       path="$1"
+
+       if [ -n "$IGNORE_BOOTID" ] ; then
+               echo " * Ignoring verification of bootid.txt as requested via ignore_bootid.">>/boot.log
+               return 0
+       fi
+
+       if [ -n "$BOOTID" ] && ! [ -r "${path}/conf/bootid.txt" ] ; then
+               echo "  * Warning: bootid=... specified but no bootid.txt found on currently requested device.">>/boot.log
+               return 1
+       fi
+
+       [ -r "${path}/conf/bootid.txt" ] || return 0
+
+       bootid_conf=$(cat "${path}/conf/bootid.txt")
+
+       if [ -z "$BOOTID" -a -z "$IGNORE_BOOTID" ]
+       then
+               echo " * Warning: bootid.txt found but ignore_bootid / bootid=.. bootoption missing...">>/boot.log
+               return 1
+       fi
+
+       if [ "$BOOTID" = "$bootid_conf" ]
+       then
+               echo " * Successfully verified /conf/bootid.txt from ISO, continuing... ">>/boot.log
+       else
+               echo " * Warning: BOOTID of ISO does not match. Retrying and continuing search...">>/boot.log
+               return 1
+       fi
+
+       return 0
+}
+
+
 matches_uuid ()
 {
        if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
@@ -103,7 +139,20 @@ check_dev ()
        # support for fromiso=.../isofrom=....
        if [ -n "$FROMISO" ]
        then
-               ISO_DEVICE=$(dirname $FROMISO)
+               fs_type="${FROMISO%%:*}"
+               fs_type_auto='1'
+               ISO_DEVICE="${FROMISO}"
+               if echo "${fs_type}" | grep -q '[^[:alnum:]_-]'; then
+                       # Not a valid file system name. Treat as part of the
+                       # path, and, especially, use autodetection.
+                       fs_type=''
+               else
+                       # Looks like a file system specification, treat it
+                       # like that.
+                       fs_type_auto='0'
+                       ISO_DEVICE="${ISO_DEVICE#*:}"
+               fi
+               ISO_DEVICE=$(dirname "${ISO_DEVICE}")
                if ! [ -b $ISO_DEVICE ]
                then
                        # to support unusual device names like /dev/cciss/c0d0p1
@@ -124,14 +173,17 @@ check_dev ()
                        # example an ISO when booting on an ONIE system
                        if echo "${FROMISO}" | grep -q "\.iso$"
                        then
-                               fs_type=$(get_fstype "${FROMISO}")
+                               if [ '0' -ne "${fs_type_auto}" ]; then
+                                       # Autodetect fs type if not overridden.
+                                       fs_type=$(get_fstype "${FROMISO}")
+                               fi
                                if is_supported_fs ${fs_type}
                                then
                                        mkdir /run/live/fromiso
-                                       mount -t $fs_type "${FROMISO}" /run/live/fromiso
+                                       mount -t "${fs_type}" -o 'ro' "${FROMISO}" '/run/live/fromiso'
                                        if [ "$?" != 0 ]
                                        then
-                                               echo "Warning: unable to mount ${FROMISO}." >>/boot.log
+                                               echo "Warning: unable to mount ${FROMISO} (type ${fs_type})." >>/boot.log
                                        fi
                                        devname="/run/live/fromiso"
                                fi
@@ -139,16 +191,30 @@ check_dev ()
                                echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
                        fi
                else
-                       fs_type=$(get_fstype "${ISO_DEVICE}")
+                       # Need to extract actual ISO file path later on,
+                       # initialize first.
+                       iso_name="${FROMISO}"
+
+                       if [ '0' -ne "${fs_type_auto}" ]; then
+                               # Try to auto-detect file system if not
+                               # explicitly provided.
+                               fs_type=$(get_fstype "${ISO_DEVICE}")
+                       else
+                               # Delete file system type override.
+                               iso_name="${iso_name#*:}"
+                       fi
+                       # At this point, the backing device should always be
+                       # at the very front, so remove that - leaving only the
+                       # ISO file path.
+                       iso_name="$(echo "${iso_name}" | sed "s|^${ISO_DEVICE}||")"
                        if is_supported_fs ${fs_type}
                        then
                                mkdir /run/live/fromiso
-                               mount -t $fs_type "$ISO_DEVICE" /run/live/fromiso
-                               ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
-                               loopdevname=$(setup_loop "/run/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
+                               mount -t "${fs_type}" -o 'ro' "$ISO_DEVICE" '/run/live/fromiso'
+                               loopdevname=$(setup_loop "/run/live/fromiso/${iso_name}" "loop" "/sys/block/loop*" "" '')
                                devname="${loopdevname}"
                        else
-                               echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
+                               echo "Warning: unable to mount $ISO_DEVICE (type ${fs_type})." >>/boot.log
                        fi
                fi
        fi
@@ -185,12 +251,13 @@ check_dev ()
 
                        /dev/md*)
                                # Adding raid support
-                               if [ -x /scripts/local-top/mdadm ]
+                               if [ -x /scripts/local-block/mdadm ]
                                then
-                                       [ -r /conf/conf.d/md ] && cp /conf/conf.d/md /conf/conf.d/md.orig
-                                       echo "MD_DEVS=$device " >> /conf/conf.d/md
-                                       /scripts/local-top/mdadm >>/boot.log
-                                       [ -r /conf/conf.d/md.orig ] && mv /conf/conf.d/md.orig /conf/conf.d/md
+                                       # Back in the day, when there was still a local-top mdadm script, we
+                                       # used to select specific devices to be auto-assembled.
+                                       # This functionality was dropped in the local-block script, so just
+                                       # scan and assemble all RAID devices.
+                                       /scripts/local-block/mdadm >>/boot.log
                                fi
                                ;;
                esac
@@ -259,7 +326,7 @@ check_dev ()
                fi
 
                if is_live_path ${mountpoint} && \
-                       ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
+                       ([ "${skip_uuid_check}" ] || grml_match_bootid ${mountpoint})
                then
                        echo ${mountpoint}
                        return 0
@@ -355,19 +422,6 @@ find_livefs ()
                                        return 0
                                fi
                        done
-               elif [ "${fstype}" = "squashfs" -o \
-                       "${fstype}" = "btrfs" -o \
-                       "${fstype}" = "ext2" -o \
-                       "${fstype}" = "ext3" -o \
-                       "${fstype}" = "ext4" -o \
-                       "${fstype}" = "jffs2" ]
-               then
-                       # This is an ugly hack situation, the block device has
-                       # an image directly on it.  It's hopefully
-                       # live-boot, so take it and run with it.
-                       ln -s "${devname}" "${devname}.${fstype}"
-                       echo "${devname}.${fstype}"
-                       return 0
                fi
        done
 
@@ -738,7 +792,7 @@ try_mount ()
                        fstype=$(get_fstype "${dev}")
                fi
                mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || \
-               ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" > boot.log && return 0 )
+               ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" >> boot.log && return 0 )
        fi
 }