X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Fcasper;h=32c4517a0331367035636901a463b5972d3d0d15;hb=40c6f4508ec0868d331e346e9d7b1c44cce01966;hp=2375bb6c2cbedfb96067b1fc2073c12be2e048b4;hpb=9a7f83110cfb153d853f5d074968a661121d4e07;p=live-boot-grml.git diff --git a/scripts/casper b/scripts/casper index 2375bb6..32c4517 100644 --- a/scripts/casper +++ b/scripts/casper @@ -6,464 +6,589 @@ export PATH=/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin mountpoint=/live_media -# Will be mounted if found as copy on write instead of tmpfs -persistence_pattern="casper-rw" - -# Each file found with this pattern will be mounted directly in the -# mountpoint extracted from file name "${other_mounts_pattern}" -other_mounts_pattern="casper-mount-" -netboot="" - -#overlay_method=unionfs -#if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then -# overlay_method=devmapper -#fi +root_persistence="casper-rw" +home_persistence="home-rw" +root_snapshot_label="casper-sn" +home_snapshot_label="home-sn" USERNAME="casper" USERFULLNAME="Live session user" -HOST="live" +HOSTNAME="live" +BUILD_SYSTEM="Debian" mkdir -p $mountpoint [ -f /etc/casper.conf ] && . /etc/casper.conf - -export USERNAME USERFULLNAME HOST - -is_casper_path() { - path=$1 - if [ -d "$path/casper" ]; then - if [ "$(echo $path/casper/*.cloop)" != "$path/casper/*.cloop" ] || - [ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ] || - [ "$(echo $path/casper/*.ext2)" != "$path/casper/*.ext2" ] || - [ "$(echo $path/casper/*.dir)" != "$path/casper/*.dir" ]; then - return 0 - fi - fi - return 1 +export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM + +. /scripts/casper-helpers + +parse_cmdline () +{ + # looking for casper specifics options as kernel parameters + for x in $(cat /proc/cmdline); do + case $x in + userfullname=*) + export USERFULLNAME=${x#userfullname=} + export CASPERCONF="changed" + ;; + hostname=*) + export HOSTNAME=${x#hostname=} + export CASPERCONF="changed" + ;; + username=*) + export USERNAME=${x#username=} + export CASPERCONF="changed" + ;; + netboot*) + export NETBOOT=${x#netboot=} ;; + toram) + export TORAM=1 ;; + todisk=*) + export TODISK=${x#todisk=} ;; + showmounts) + export SHOWMOUNTS=1 ;; + persistent) + export PERSISTENT=1 ;; + ip*) + STATICIP=${x#ip=} + if [ "${STATICIP}" == "" ]; then + STATICIP="frommedia" + fi + export STATICIP ;; + casper-getty) + export CASPERGETTY=1 ;; + console=*) + export DEFCONSOLE=$(sed -e 's%.*console=%console=%' /proc/cmdline) ;; + bootfrom=*) + export LIVEMEDIA=${x#bootfrom=} ;; + live-media=*) + export LIVEMEDIA=${x#live-media=} ;; + debian-installer/locale=*) + export LOCALE=${x#debian-installer/locale=} ;; + locale=*) + export LOCALE=${x#locale=} ;; + kbd-chooser/method=*) + export KBD=${x#kbd-chooser/method=} ;; + keyb=*) + export KBD=${x#keyb=} ;; + console-setup/layoutcode=*) + export CSLAYOUT=${x#console-setup/layoutcode=} ;; + console-setup/variantcode=*) + export CSVARIANT=${x#console-setup/variantcode=} ;; + console-setup/modelcode=*) + export CSMODEL=${x#console-setup/modelcode=} ;; + esac + done + + # sort of compatibility with netboot.h from linux docs + if [ -z "${NETBOOT}" ]; then + if [ "${ROOT}" == "/dev/nfs" ]; then + NETBOOT="nfs" + export NETBOOT + elif [ "${ROOT}" == "/dev/cifs" ]; then + NETBOOT="cifs" + export NETBOOT + fi + fi } -subdevices() { - sysblock=$1 - r="" - for dev in "${sysblock}" "${sysblock}"/*; do - if [ -e "${dev}/dev" ]; then - r="${r} ${dev}" - fi - done - echo ${r} +is_casper_path() { + path=$1 + if [ -d "$path/casper" ]; then + if [ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ] || + [ "$(echo $path/casper/*.ext2)" != "$path/casper/*.ext2" ] || + [ "$(echo $path/casper/*.dir)" != "$path/casper/*.dir" ]; then + return 0 + fi + fi + return 1 } get_backing_device() { - case "$1" in - *.cloop) - echo $(setup_loop "$1" "cloop" "/sys/block/cloop*") - ;; - *.squashfs|*.ext2) - echo $(setup_loop "$1" "loop" "/sys/block/loop*") - ;; - *.dir) - echo "directory" - ;; - *) - panic "Unrecognized casper filesystem: $1" - ;; - esac + case "$1" in + *.squashfs|*.ext2) + echo $(setup_loop "$1" "loop" "/sys/block/loop*") + ;; + *.dir) + echo "directory" + ;; + *) + panic "Unrecognized casper filesystem: $1" + ;; + esac } match_files_in_dir() { - # Does any files match pattern $1 ? + # Does any files match pattern $1 ? - local pattern="$1" - if [ "$(echo $pattern)" != "$pattern" ]; then - return 0 - fi - return 1 + local pattern="$1" + if [ "$(echo $pattern)" != "$pattern" ]; then + return 0 + fi + return 1 } mount_images_in_directory() { - directory="$1" - rootmnt="$2" - if match_files_in_dir "$directory/casper/*.cloop"; then - # Let's hope there's just one matching *.cloop... FIXME - setup_devmapper $(get_backing_device "$directory/casper/*.cloop") "$rootmnt" - elif match_files_in_dir "$directory/casper/*.squashfs" || - match_files_in_dir "$directory/casper/*.ext2" || - match_files_in_dir "$directory/casper/*.dir"; then - setup_unionfs "$directory/casper" "$rootmnt" - else + directory="$1" + rootmnt="$2" + if match_files_in_dir "$directory/casper/*.squashfs" || + match_files_in_dir "$directory/casper/*.ext2" || + match_files_in_dir "$directory/casper/*.dir"; then + setup_unionfs "$directory/casper" "$rootmnt" + else : - fi + fi } -sys2dev() { - sysdev=${1#/sys} - echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})" +is_nice_device() { + sysfs_path="${1#/sys}" + if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"; then + return 0 + fi + return 1 } -setup_loop() { - local fspath=$1 - local module=$2 - local pattern=$3 - - modprobe -qb "$module" - if [ -x /sbin/udevplug ]; then - udevplug -W - else - udevtrigger - fi - - for loopdev in $pattern; do - if [ "$(cat $loopdev/size)" -eq 0 ]; then - dev=$(sys2dev "${loopdev}") - losetup "$dev" "$fspath" - echo "$dev" - return 0 - fi - done - panic "No loop devices available" +is_supported_fs () +{ + # FIXME: do something better like the scan of supported filesystems + fstype="${1}" + case ${fstype} in + vfat|iso9660|udf|ext2|ext3|ntfs) + return 0 + ;; + esac + return 1 } -get_fstype() { - #FIXME# one use of this function expects "unknown" another does not! - # which is it??? - local FSTYPE - local FSSIZE - eval $(fstype < $1) - if [ "$FSTYPE" != "unknown" ]; then - echo $FSTYPE - return 0 - fi - /lib/udev/vol_id -t $1 2>/dev/null +copy_live_to() { + copyfrom="${1}" + copytodev="${2}" + copyto="${copyfrom}_swap" + + size=$(fs_size "" ${copyfrom} "used") + + if [ "${copytodev}" = "ram" ]; then + # copying to ram: + freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) ) + mount_options="-o size=${size}k" + free_string="memory" + fstype="tmpfs" + dev="/dev/shm" + else + # it should be a writable block device + if [ -b "${copytodev}" ]; then + dev="${copytodev}" + free_string="space" + fstype=$(get_fstype "${dev}") + freespace=$(fs_size "${dev}") + else + [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device." + return 1 + fi + fi + if [ "${freespace}" -lt "${size}" ] ; then + [ "$quiet" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k > ${size}k) to copy live media in ${copytodev}." + return 1 + fi + + # begin copying.. + mkdir "${copyto}" + echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}" + mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}" + cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files + umount ${copyfrom} + mount -r -o move ${copyto} ${copyfrom} + rmdir ${copyto} + return 0 } -setup_devmapper() { - backdev="$1" - rootmnt="$2" +do_netmount() { + rc=1 - modprobe -qb dm-mod - COW_DEVICE=/dev/ram1 - COW_NAME="casper-cow" + modprobe "${MP_QUIET}" af_packet # For DHCP - BACKING_FILE_SIZE=$(blockdev --getsize "$backdev") - MAX_COW_SIZE=$(blockdev --getsize "$COW_DEVICE") - CHUNK_SIZE=8 # sectors + ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf - if [ -z "$COW_SIZE" -o "$COW_SIZE" -gt "$MAX_COW_SIZE" ]; then - COW_SIZE=$MAX_COW_SIZE - fi + if [ "${NFSROOT}" = "auto" ]; then + NFSROOT=${ROOTSERVER}:${ROOTPATH} + fi - echo "0 $COW_SIZE linear $COW_DEVICE 0" | dmsetup create $COW_NAME + [ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}" - echo "0 $BACKING_FILE_SIZE snapshot $backdev /dev/mapper/$COW_NAME p $CHUNK_SIZE" | \ - dmsetup create casper-snapshot - if [ "$(get_fstype $backdev)" = "unknown" ]; then - panic "Unknown file system type on $backdev" - fi - mount -t $(get_fstype "$backdev") /dev/mapper/casper-snapshot $rootmnt || panic "Can not mount /dev/mapper/casper/snapshot on $rootmnt" + if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then + rc=0 + elif do_nfsmount ; then + NETBOOT="nfs" + export NETBOOT + rc=0 + fi - mkdir -p "$rootmnt/rofs" - echo "0 $BACKING_FILE_SIZE linear $backdev 0" | dmsetup create casper-backing - mount -t $(get_fstype "$backdev") /dev/mapper/casper-backing "$rootmnt/rofs" + [ "$quiet" != "y" ] && log_end_msg + return ${rc} } -where_is_mounted() { - device=$1 - if grep -q "^$device " /proc/mounts; then - grep "^$device " /proc/mounts | read d mountpoint rest - echo $mountpoint - return 0 - fi - return 1 -} +do_nfsmount() { + rc=1 + modprobe "${MP_QUIET}" nfs + if [ -z "${NFSOPTS}" ]; then + NFSOPTS="" + fi -copy_to_ram() { - copyform="$1" - copyto="${copyform}_swap" - - size=$(du -ks ${copyform} | cut -f1) - size=$(expr ${size} + ${size}/20 ) # Fixme: 5% more to be sure - needed_space=$(expr ${size} * 1024) - freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - )) - - if [ ! ${freespace} -lt ${needed_space} ] ; then - [ "$quiet" != "y" ] && log_begin_msg "Not enough free memory to copy to ram" - [ "$quiet" != "y" ] && log_end_msg - return - else - [ "$quiet" != "y" ] && log_begin_msg "Copying live media to ram..." - mkdir "${copyto}" - mount -t tmpfs -o size=${size}k /dev/shm ${copyto} - cp -a ${copyform}/* ${copyto} - umount ${copyform} - mount -r -o move ${copyto} ${copyform} - rmdir ${copyto} - [ "$quiet" != "y" ] && log_end_msg - fi + [ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}" + # FIXME: This for loop is an ugly HACK round an nfs bug + for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do + nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break + sleep 1 + done + return ${rc} } -find_cow_device() { - pers_label="${1}" - cow_backing="/${pers_label}-backing" - for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do - for dev in $(subdevices "${sysblock}"); do - devname=$(sys2dev "${dev}") - if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then - echo "$devname" - return - elif [ "$(get_fstype ${devname})" = "vfat" ]; then - mkdir -p "${cow_backing}" - if where_is_mounted ${devname} > /dev/null; then - mount -o remount,rw ${devname} $(where_is_mounted ${devname}) || panic "Remounting failed" - mount -o bind $(where_is_mounted ${devname}) ${cow_backing} || panic "Cannot bind-mount" - else - mount -t $(get_fstype "${devname}") -o rw "${devname}" ${cow_backing} || panic "Cannot mount $devname on /cow-backing" - fi - - if [ -e "${cow_backing}/${pers_label}" ]; then - echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*") - return 0 - else - umount ${cow_backing} - fi - fi - done - done +do_cifsmount() { + rc=1 + if [ -x "/sbin/mount.cifs" ]; then + if [ -z "${NFSOPTS}" ]; then + CIFSOPTS="-ouser=root,password=" + else + CIFSOPTS="${NFSOPTS}" + fi + + [ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}" + modprobe "${MP_QUIET}" cifs + + if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then + rc=0 + fi + fi + return ${rc} } -do_netmount() { - # Will mount a remote share and return the mountpoint - - modprobe -q nfs - # For DHCP - modprobe -q af_packet - - ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf - if [ "x${NFSROOT}" = "xauto" ]; then - NFSROOT=${ROOTSERVER}:${ROOTPATH} - fi - - #choose NFS or CIFS mount - if [ ${netboot} = "NFS" ] ; then - echo $(do_nfsmount) - else - echo $(do_cifsmount) - fi +do_snap_copy () +{ + fromdev="${1}" + todir="${2}" + snap_type="${3}" + + size=$(fs_size "${fromdev}" "" "used") + + if [ -b "${fromdev}" ]; then + # look for free mem + if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]; then + todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' ) + freespace=$(df -k | grep -s ${todev} | awk '{print $4}') + else + freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - )) + fi + + tomount="/mnt/tmpsnap" + if [ ! -d "${tomount}" ] ; then + mkdir -p "${tomount}" + fi + + fstype=$(get_fstype "${fromdev}") + if [ -n "${fstype}" ]; then + # Copying stuff... + mount -t "${fstype}" -o ro "${fromdev}" "${tomount}" + cp -a "${tomount}"/* ${todir} + umount "${tomount}" + else + log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}" + fi + + rmdir "${tomount}" + if echo ${fromdev} | grep -qs loop; then + losetup -d "${fromdev}" + fi + return 0 + else + return 1 + [ "$quiet" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium" + fi } -do_nfsmount() { - if [ "x${NFSOPTS}" = "x" ]; then - NFSOPTS="" - fi - - [ "$quiet" != "y" ] && log_begin_msg "Mounting NFS with nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}" - while true ; do - nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && break - sleep 1 - done - echo "${mountpoint}" - # FIXME: add error check - [ "$quiet" != "y" ] && log_end_msg +try_snap () +{ + # Look for $snap_label.* in block devices and copy the contents to $snap_mount + # and remember the device and filename for resync on exit in casper.init + + snap_label="${1}" + snap_mount="${2}" + snap_type="${3}" + + snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2") + if [ ! -z "${snapdata}" ]; then + snapdev="$(echo ${snapdata} | cut -f1 -d ' ')" + snapback="$(echo ${snapdata} | cut -f2 -d ' ')" + snapfile="$(echo ${snapdata} | cut -f3 -d ' ')" + if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\)'; then + # squashfs or ext2 snapshot + dev=$(get_backing_device "${snapback}/${snapfile}") + if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"; then + log_warning_msg "Impossible to include the ${snapfile} Snapshot" + return 1 + fi + else + # cpio.gz snapshot + if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null) ; then + log_warning_msg "Impossible to include the ${snapfile} Snapshot" + return 1 + fi + fi + umount "${snapback}" + else + dev=$(find_cow_device "${snap_label}") + if [ -b ${dev} ]; then + if echo "${dev}" | grep -qs loop; then + # strange things happens, user confused? + snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' ) + snapfile=$(basename ${snaploop}) + snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ') + else + snapdev="${dev}" + fi + if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" ; then + log_warning_msg "Impossible to include the ${snap_label} Snapshot" + return 1 + else + if [ -n "${snapfile}" ]; then + # it was a loop device, user confused + umount ${snapdev} + fi + fi + else + log_warning_msg "Impossible to include the ${snap_label} Snapshot" + return 1 + fi + fi + echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt + return 0 } -do_cifsmount() { - NFSOPTS="-ouser=root,password=" +setup_unionfs() { + image_directory="$1" + rootmnt="$2" - [ "$quiet" != "y" ] && log_begin_msg "Mounting using mount.cifs with ${NFSROOT} ${mountpoint} ${NFSOPTS}" - mount.cifs "${NFSROOT}" "${mountpoint}" "${NFSOPTS}" && echo "${mountpoint}" - # FIXME: add error check - [ "$quiet" != "y" ] && log_end_msg -} + modprobe "${MP_QUIET}" -b unionfs -setup_unionfs() { - image_directory="$1" - rootmnt="$2" - image_type="$3" - - modprobe -qb unionfs - croot="" # Should really be /casper, but run-init doesn't handle - # mount-points in subdirectories at all - - # Let's just mount the read-only file systems first - rofsstring="" - rofslist="" - mkdir -p "${croot}" - for image_type in "ext2" "squashfs" "dir" ; do - for image in "${image_directory}"/*."${image_type}"; do - imagename=$(basename "${image}") - if [ -d "${image}" ]; then - # it is a plain directory: do nothing - rofslist="${image} ${rofslist}" - rofsstring="${image}=ro:${rofsstring}" - elif [ -f "${image}" ]; then - backdev=$(get_backing_device "$image") - fstype=$(get_fstype "${backdev}") - if [ "${fstype}" = "unknown" ]; then - panic "Unknown file system type on ${backdev} (${image})" - fi - mkdir -p "${croot}/${imagename}" - mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=ro:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}" - fi - done - done - rofsstring=${rofsstring%:} - - mkdir -p /cow - cowdevice="tmpfs" - cow_fstype="tmpfs" - - # Looking for "${root_persistence}" device or file - if grep -q persistent /proc/cmdline; then - cowprobe=$(find_cow_device "${root_persistence}") - if [ -b "${cowprobe}" ]; then - cowdevice=${cowprobe} - cow_fstype=$(get_fstype "${cowprobe}") - else - [ "$quiet" != "y" ] && log_begin_msg "Unable to find the persistent medium" - fi - fi - - mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow" - - mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" - - for d in ${rofslist}; do - mkdir -p "${rootmnt}/casper/${d}" - mount -o bind "${d}" "${rootmnt}/${d}" - case d in - *.dir) ;; # do nothing - *) umount "${d}" ;; - esac - done - - # Adding other custom mounts - if grep -q homepersistence /proc/cmdline; then - homecow=$(find_cow_device "${home_persistence}" ) - if [ -b "${homecow}" ]; then - mount ${homecow} -t $(get_fstype "${homecow}") -o rw "${rootmnt}/home" - else - [ "$quiet" != "y" ] && log_begin_msg "Unable to find the persistent home medium" - fi - fi - - if grep -q show-cow /proc/cmdline; then - mkdir -p "$rootmnt/cow" - mount -o bind /cow "$rootmnt/cow" - fi + # run-init can't deal with images in a subdir, but we're going to + # move all of these away before it runs anyway. No, we're not, + # put them in / since move-mounting them into / breaks mono and + # some other apps. + + croot="/" + + # Let's just mount the read-only file systems first + rofsstring="" + rofslist="" + if [ "${NETBOOT}" == "nfs" ] ; then + roopt="nfsro" # go aroung a bug in nfs-unionfs locking + else + roopt="ro" + fi + + mkdir -p "${croot}" + for image_type in "ext2" "squashfs" "dir" ; do + for image in "${image_directory}"/*."${image_type}"; do + imagename=$(basename "${image}") + if [ -d "${image}" ]; then + # it is a plain directory: do nothing + rofsstring="${image}=${roopt}:${rofsstring}" + rofslist="${image} ${rofslist}" + elif [ -f "${image}" ]; then + backdev=$(get_backing_device "$image") + fstype=$(get_fstype "${backdev}") + if [ "${fstype}" = "unknown" ]; then + panic "Unknown file system type on ${backdev} (${image})" + fi + mkdir -p "${croot}/${imagename}" + mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}" + fi + done + done + rofsstring=${rofsstring%:} + + mkdir -p /cow + cowdevice="tmpfs" + cow_fstype="tmpfs" + + # Looking for "${root_persistence}" device or file + if [ -n "${PERSISTENT}" ]; then + cowprobe=$(find_cow_device "${root_persistence}") + if [ -b "${cowprobe}" ]; then + cowdevice=${cowprobe} + cow_fstype=$(get_fstype "${cowprobe}") + else + [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium" + fi + fi + + mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow" + + mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" || panic "Unionfs mount failed" + + # Adding other custom mounts + if [ -n "${PERSISTENT}" ]; then + # directly mount /home + # FIXME: add a custom mounts configurable system + homecow=$(find_cow_device "${home_persistence}" ) + if [ -b "${homecow}" ]; then + mount -t $(get_fstype "${homecow}") -o rw "${homecow}" "${rootmnt}/home" + export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy() + else + [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium" + fi + # Look for other snapshots to copy in + try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT" + try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME" + fi + + if [ -n "${SHOWMOUNTS}" ]; then + for d in ${rofslist}; do + mkdir -p "${rootmnt}/casper/${d##*/}" + case d in + *.dir) # do nothing # mount -o bind "${d}" "${rootmnt}/casper/${d##*/}" + ;; + *) mount -o move "${d}" "${rootmnt}/casper/${d##*/}" + ;; + esac + done + fi + + # shows cow fs on /cow for use by casper-snapshot + mkdir -p "${rootmnt}/cow" + mount -o bind /cow "${rootmnt}/cow" } -is_usb_device() { - sysfs_path="${1#/sys}" - if /lib/udev/path_id "${sysfs_path}" | grep -Eq "ID_PATH=(usb|pci-[^-]*-usb)"; then - return 0 +check_dev () +{ + sysdev="${1}" + devname="${2}" + if [ -z "${devname}" ]; then + devname=$(sys2dev "${sysdev}") + fi + fstype=$(get_fstype "${devname}") + if is_supported_fs ${fstype}; then + mount -t ${fstype} -o ro "${devname}" $mountpoint || continue + if is_casper_path $mountpoint; then + echo $mountpoint + return 0 + else + umount $mountpoint + fi fi return 1 } find_livefs() { - mounted= - for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do - devname=$(sys2dev "${sysblock}") - fstype=$(get_fstype "${devname}") - if /lib/udev/cdrom_id ${devname} > /dev/null; then - mount -t ${fstype} -o ro "$devname" $mountpoint || continue - if is_casper_path $mountpoint; then - echo $mountpoint - return - else - umount $mountpoint - fi - elif is_usb_device "$sysblock"; then - for dev in $(subdevices "${sysblock}"); do - devname=$(sys2dev "${dev}") - fstype=$(get_fstype "${devname}") - case ${fstype} in - vfat|iso9660|udf) - mount -t ${fstype} -o ro "${devname}" $mountpoint || continue - if is_casper_path $mountpoint; then - echo $mountpoint - return - else - umount $mountpoint - fi - ;; - esac - done - elif [ "${fstype}" = "squashfs" || \ - "${fstype}" = "ext2" ]; then - - # This is an ugly hack situation, the block device has - # an image directly on it. It's hopefully - # casper, so take it and run with it. - - ln -s "${devname}" "${devname}.${fstype}" - echo "${devname}.${fstype}" - return - fi - done + # first look at the one specified in the command line + if [ ! -z "${LIVEMEDIA}" ]; then + if check_dev "null" "${LIVEMEDIA}"; then + return 0 + fi + fi + # or do the scan of block devices + for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do + devname=$(sys2dev "${sysblock}") + fstype=$(get_fstype "${devname}") + if /lib/udev/cdrom_id ${devname} > /dev/null; then + if check_dev "null" "${devname}" ; then + return 0 + fi + elif is_nice_device "${sysblock}" ; then + for dev in $(subdevices "${sysblock}"); do + if check_dev "${dev}" ; then + return 0 + fi + done + elif [ "${fstype}" = "squashfs" -o \ + "${fstype}" = "ext3" ] -o \ + "${fstype}" = "ext2" ]; then + # This is an ugly hack situation, the block device has + # an image directly on it. It's hopefully + # casper, so take it and run with it. + ln -s "${devname}" "${devname}.${fstype}" + echo "${devname}.${fstype}" + return 0 + fi + done + return 1 +} + +pulsate() { + if [ -x /sbin/usplash_write ]; then + /sbin/usplash_write "PULSATE" + fi } set_usplash_timeout() { - if [ -x /sbin/usplash_write ]; then - /sbin/usplash_write "TIMEOUT 120" - fi + if [ -x /sbin/usplash_write ]; then + /sbin/usplash_write "TIMEOUT 120" + fi } mountroot() { - exec 6>&1 - exec 7>&2 - exec > casper.log - exec 2>&1 - - set_usplash_timeout - [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount" - run_scripts /scripts/casper-premount - [ "$quiet" != "y" ] && log_end_msg - - # Needed here too because some things (*cough* udev *cough*) - # changes the timeout - - set_usplash_timeout - - if grep -q netboot /proc/cmdline; then - netboot="CIFS" - for x in $(cat /proc/cmdline); do - case $x in - netboot=*) - netboot=${x#netboot=} - ;; - esac - done - livefs_root=$(do_netboot) - else - # Scan devices for the image - for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do - livefs_root=$(find_livefs) - if [ "${livefs_root}" ]; then - break - fi - sleep 1 - done - fi - - if [ "$?" -gt 0 ]; then - panic "Unable to find a medium containing a live file system" - fi - - if grep -q toram /proc/cmdline; then - copy_to_ram "${livefs_root}" - fi - - mount_images_in_directory "$livefs_root" "$rootmnt" - - log_end_msg - - maybe_break casper-bottom - [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom" - - run_scripts /scripts/casper-bottom - [ "$quiet" != "y" ] && log_end_msg - - exec 1>&6 6>&- - exec 2>&7 7>&- - cp casper.log "${rootmnt}/var/log/" + exec 6>&1 + exec 7>&2 + exec > casper.log + exec 2>&1 + + parse_cmdline + + set_usplash_timeout + [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount" + pulsate + run_scripts /scripts/casper-premount + [ "$quiet" != "y" ] && log_end_msg + + # Needed here too because some things (*cough* udev *cough*) + # changes the timeout + + set_usplash_timeout + + if [ ! -z "${NETBOOT}" ]; then + if do_netmount ; then + livefs_root="${mountpoint}" + else + panic "Unable to find a the network rootfs live file system" + fi + else + # Scan local devices for the image + for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do + livefs_root=$(find_livefs) + if [ ! -z "${livefs_root}" ]; then + break + fi + sleep 1 + done + fi + + if [ -z "${livefs_root}" ]; then + panic "Unable to find a medium containing a live file system" + fi + + if [ -n "${TORAM}" ]; then + live_dest="ram" + elif [ -n "${TODISK}" ]; then + live_dest="${TODISK}" + fi + if [ -n "${live_dest}" ]; then + [ "$quiet" != "y" ] && log_begin_msg "Copying live_media to ${live_dest}" + copy_live_to "${livefs_root}" "${live_dest}" + [ "$quiet" != "y" ] && log_end_msg + fi + + mount_images_in_directory "${livefs_root}" "${rootmnt}" + + log_end_msg + + maybe_break casper-bottom + [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom" + + pulsate + run_scripts /scripts/casper-bottom + [ "$quiet" != "y" ] && log_end_msg + + exec 1>&6 6>&- + exec 2>&7 7>&- + cp casper.log "${rootmnt}/var/log/" }