--- /dev/null
+#! /bin/bash
+
+# casper-snapshot - utility to manage Debian Live systems snapshots
+#
+# This program mount a device (fallback to /tmpfs under /mnt/snapshot
+# and save the /cow (or a different dir) filesystem in it for reusing
+# in another casper session. Look at manpage for more info.
+#
+# Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# On Debian systems, the complete text of the GNU General Public License
+# can be found in /usr/share/common-licenses/GPL file.
+
+PROGRAM="`basename $0`"
+VERSION=0.0.1
+
+
+# Source casper conf
+if [ -e /etc/casper.conf ]; then
+ . /etc/casper.conf
+else
+ USERNAME=$(cat /etc/passwd | grep "999" | cut -f1 -d ':')
+ HOSTNAME=$(hostname)
+ BUILD_SYSTEM="Debian"
+fi
+
+export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
+
+# Source helper functions
+helpers="/usr/share/initramfs-tools/scripts/casper-helpers"
+if [ -e "${helpers}" ]; then
+ . "${helpers}"
+else
+ echo "Error: I cannot found helper functions \"${helpers}\"."
+ exit 1
+fi
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
+. /lib/lsb/init-functions
+
+MOUNTP=""
+COW=""
+DEV=""
+DEST=""
+TYPE=""
+DESKTOP_LINK=""
+
+Header ()
+{
+ echo "${PROGRAM} - utility to do Debian Live snapshots"
+ echo
+ echo "Usage: ${PROGRAM} [-c|--cow DIRECTORY] [-d|--device DEVICE] [-o|--output FILE] [-t|--type TYPE]"
+ echo "Usage: ${PROGRAM} [-r|--resync-string STRING]"
+ echo "Usage: ${PROGRAM} [-h|--help]"
+ echo "Usage: ${PROGRAM} [-u|--usage]"
+ echo "Usage: ${PROGRAM} [-v|--version]"
+}
+
+Usage ()
+{
+ MESSAGE=${1}
+ Header
+ echo
+ echo "Try \"${PROGRAM} --help\" for more information."
+ if [ ! -z "${MESSAGE}" ]; then
+ echo -e "${MESSAGE}"
+ exit 1
+ else
+ exit 0
+ fi
+}
+
+Help ()
+{
+ Header
+ echo
+ echo "Options:"
+ echo " -c, --cow: specifies the copy on write directory (default: /cow)."
+ echo " -d, --device: specifies the output snapshot device (default: none)."
+ echo " -o, --output: specifies the output image file (default: $type dependent)."
+ echo " -r, --resync-string: internally used to resync previous made snapshots."
+ echo " -t, --type: specifies the snapshot type between \"squashfs\", \"ext2\" or \"cpio\".gz archive (default: cpio)"
+ echo -e "\nLook at casper-snapshot(1) man page for more information."
+ exit 0
+}
+
+Version ()
+{
+ echo "${PROGRAM}, version ${VERSION}"
+ echo
+ echo "Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>"
+ echo
+ echo "This program is free software; you can redistribute it and/or modify"
+ echo "it under the terms of the GNU General Public License as published by"
+ echo "the Free Software Foundation; either version 2 of the License, or"
+ echo "(at your option) any later version."
+ echo
+ echo "This program is distributed in the hope that it will be useful,"
+ echo "but WITHOUT ANY WARRANTY; without even the implied warranty of"
+ echo "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"
+ echo "GNU General Public License for more details."
+ echo
+ echo "You should have received a copy of the GNU General Public License"
+ echo "along with this program; if not, write to the Free Software"
+ echo "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA"
+ echo
+ echo "On Debian systems, the complete text of the GNU General Public License"
+ echo "can be found in /usr/share/common-licenses/GPL file."
+ echo
+ echo "Homepage: <http://live.debian.net/>"
+ exit 0
+}
+
+Do_snapshot ()
+{
+ case "${TYPE}" in
+ squashfs)
+ echo "./tmp/exclude_list" > /tmp/exclude_list
+ ( cd "${COW}" && find . -name '*.wh.*' >> /tmp/exclude_list )
+ mksquashfs "${COW}" "${DEST}" -ef /tmp/exclude_list || exit 1
+ rm /tmp/exclude_list
+ ;;
+ cpio)
+ ( cd "${COW}" && find . -path '*.wh.*' -prune -o -print0 | cpio --quiet -o0 -H newc | gzip -9c > "${DEST}" ) || exit 1
+ ;;
+ ext2)
+ DU_DIM="`du -ks ${COW} | cut -f1`"
+ REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...
+ genext2fs --size-in-blocks=${REAL_DIM} --reserved-blocks=0 --root="${COW}" "${DEST}" || exit 1
+ ;;
+ *)
+ echo "Internal error."
+ exit 1
+ ;;
+ esac
+}
+
+Is_same_mount ()
+{
+ dir1="`Base_path $1`"
+ dir2="`Base_path $2`"
+ if [ "${dir1}" == "${dir2}" ]; then
+ return 0
+ else
+ return 1
+ fi
+}
+
+Parse_args ()
+{
+ # Parse command line
+ ARGS="$1"
+ ARGUMENTS="`getopt --longoptions cow:,device:,output,resync-string:,type:,help,usage,version --name=${PROGRAM} --options c:d:o:t:r:,h,u,v --shell sh -- ${ARGS}`"
+
+ if [ "$?" != "0" ]; then
+ echo "Terminating." >&2
+ exit 1
+ fi
+
+ eval set -- "${ARGUMENTS}"
+
+ while true; do
+ case "$1" in
+ -c|--cow)
+ SNAP_COW="$2"; shift 2 ;;
+ -d|--device)
+ SNAP_DEV="$2"; shift 2 ;;
+ -o|--output)
+ SNAP_OUTPUT="$2"; shift 2 ;;
+ -t|--type)
+ SNAP_TYPE="$2"; shift 2 ;;
+ -r|--resync-string)
+ SNAP_RSTRING="$2"; break ;;
+ -h|--help)
+ Help; shift ;;
+ -u|--usage)
+ Usage ; shift ;;
+ -v|--version)
+ Version; shift ;;
+ --)
+ shift; break ;;
+ *)
+ echo "Internal error."; exit 1 ;;
+ esac
+ done
+}
+
+Mount_device ()
+{
+ dev="$1"
+
+ if [ ! -d "${MOUNTP}" ]; then
+ mkdir -p "${MOUNTP}"
+ fi
+
+ if [ -z "${dev}" ]; then
+ # create a temp
+ mount -t tmpfs -o rw tmpfs "${MOUNTP}"
+ if [ ! -L /home/$USERNAME/Desktop/casper-snapshot ]; then
+ ln -s "${MOUNTP}" /home/$USERNAME/Desktop/casper-snapshot
+ fi
+ else
+ if [ -b "${dev}" ] ; then
+ try_mount "${dev}" "${MOUNTP}" rw
+ fi
+ fi
+}
+
+Defaults ()
+{
+ MOUNTP="/mnt/casper-snapshot"
+ COW="/cow"
+ DEV=""
+ DEST="${MOUNTP}/casper-sn.cpio.gz"
+ TYPE="cpio"
+ DESKTOP_LINK=/home/$USERNAME/Desktop/casper-snapshot
+
+ if [ -n "${SNAP_RSTRING}" ]; then
+ COW=$(echo "${SNAP_RSTRING}" | cut -f1 -d ':')
+ DEV=$(echo "${SNAP_RSTRING}" | cut -f2 -d ':')
+ DEST=$(echo "${SNAP_RSTRING}" | cut -f3 -d ':')
+
+ case "${DEST}" in
+ *.cpio.gz)
+ TYPE="cpio" ;;
+ *.squashfs)
+ TYPE="squashfs" ;;
+ "")
+ TYPE="ext2" ;;
+ *.ext2)
+ TYPE="ext2" ;;
+ *)
+ Usage "Unregognized String" ;;
+ esac
+ else
+ DEF_COW="/cow"
+ # Bad options handling
+ if [ -z "${SNAP_COW}" ]; then
+ COW="${DEF_COW}"
+ else
+ COW="${SNAP_COW}"
+ fi
+
+ case "${SNAP_TYPE}" in
+ "cpio"|"squashfs"|"ext2")
+ TYPE="${SNAP_TYPE}"
+ ;;
+ "")
+ TYPE="cpio" ;;
+ *)
+ Usage "Error: unrecognized snapshot type"
+ ;;
+ esac
+ #if [ -d
+ #if Is_same_mount
+ fi
+
+ # check vars
+ if [ ! -d "${COW}" ]; then
+ Usage "Error: ${COW} is not a directory"
+ fi
+
+ Mount_device $DEV
+
+}
+
+Clean ()
+{
+ if [ -n "$DEV" ]; then
+ umount "${MOUNTP}"
+ rmdir "${MOUNTP}"
+ rm
+ fi
+}
+
+Main ()
+{
+ Parse_args "$@"
+ Defaults
+ Do_snapshot
+ Clean
+}
+
+Main "$@"
mountpoint=/cdrom
-mkdir -p $mountpoint
-
-#overlay_method=unionfs
-#if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then
-# overlay_method=devmapper
-#fi
-
USERNAME=casper
USERFULLNAME="Live session user"
HOST=live
+BUILD_SYSTEM=Custom
+
+mkdir -p $mountpoint
[ -f /etc/casper.conf ] && . /etc/casper.conf
+export USERNAME USERFULLNAME HOST BUILD_SYSTEM
+
+. /scripts/casper-helpers
-export USERNAME USERFULLNAME HOST
+if [ ! -f /casper.vars ]; then
+ touch /casper.vars
+fi
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" ]; 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
}
-subdevices() {
- sysblock=$1
- r=""
- for dev in "${sysblock}" "${sysblock}"/*; do
- if [ -e "${dev}/dev" ]; then
- r="${r} ${dev}"
- fi
- done
- echo ${r}
-}
-
get_backing_device() {
- case "$1" in
- *.cloop)
- echo $(setup_loop "$1" "cloop" "/sys/block/cloop*")
- ;;
- *.squashfs)
- echo $(setup_loop "$1" "loop" "/sys/block/loop*")
- ;;
- *)
- 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() {
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"; then
+ 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" "$rootmnt"
- else
+ else
:
fi
}
-sys2dev() {
- sysdev=${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"
- udevsettle
-
- for loopdev in $pattern; do
- if [ "$(cat $loopdev/size)" -eq 0 ]; then
- dev=$(sys2dev "${loopdev}")
- losetup "$dev" "$fspath"
- echo "$dev"
+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
- fi
- done
- panic "No loop devices available"
+ ;;
+ esac
+ return 1
}
-get_fstype() {
- local FSTYPE
- local FSSIZE
- eval $(fstype < $1)
- if [ "$FSTYPE" != "unknown" ]; then
- echo $FSTYPE
- return 0
+copy_live_to() {
+ copyfrom="${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
- /lib/udev/vol_id -t $1 2>/dev/null
+
+ # begin copying..
+ mkdir "${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 | tee /netboot.config
- if [ -z "$COW_SIZE" -o "$COW_SIZE" -gt "$MAX_COW_SIZE" ]; then
- COW_SIZE=$MAX_COW_SIZE
+ 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 $backdev"
+ if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
+ rc=0
+ elif do_nfsmount ; then
+ NETBOOT="nfs"
+ export NETBOOT
+ rc=0
fi
- mount -t $(get_fstype "$backdev") /dev/mapper/casper-snapshot $rootmnt || panic "Can not mount /dev/mapper/casper/snapshot on $rootmnt"
- mkdir -p "$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 $mountpoint
- return 0
+do_nfsmount() {
+ rc=1
+ modprobe "${MP_QUIET}" nfs
+ if [ -z "${NFSOPTS}" ]; then
+ NFSOPTS=""
fi
- return 1
+
+ [ "$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() {
- 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 $devname 2>/dev/null)" = "casper-rw" ]; then
- echo "$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 $devname on /cow-backing"
- fi
+do_cifsmount() {
+ rc=1
+ if [ -x "/sbin/mount.cifs" ]; then
+ if [ -z "${NFSOPTS}" ]; then
+ CIFSOPTS="-ouser=root,password="
+ else
+ CIFSOPTS="${NFSOPTS}"
+ fi
- if [ -e "/cow-backing/casper-rw" ]; then
- echo $(setup_loop "/cow-backing/casper-rw" "loop" "/sys/block/loop*")
- return 0
- else
- umount /cow-backing
+ [ "$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 ${rc}
+}
+
+do_snap_copy ()
+{
+ fromdev="${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
+}
+
+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
-
- done
- done
- return 1
+ 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
}
setup_unionfs() {
image_directory="$1"
rootmnt="$2"
- modprobe -Qb unionfs
+
+ modprobe "${MP_QUIET}" -b unionfs
# 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,
croot="/"
# Let's just mount the read-only file systems first
- mkdir -p "${croot}"
- for image in "${image_directory}"/*.squashfs; do
- imagename=$(basename "${image}")
- 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}"
- done
-
rofsstring=""
- for dir in $(mount -t squashfs | cut -d\ -f 3); do
- rofsstring="$dir=ro:$rofsstring"
+ rofslist=""
+ if [ "${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
-
- if grep -q persistent /proc/cmdline; then
- i=0
- # We love udev and the kernel!
- while [ "$i" -lt 300 ]; do
- cowdevice=$(find_cow_device)
- if [ -b "$cowdevice" ]; then
- mount -t $(get_fstype "$cowdevice") -o rw "$cowdevice" /cow || panic "Can not mount $cowdevice on /cow"
- break
- fi
- sleep 0.1
- i=$(( $i + 1 ))
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+
+ # Looking for "${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/${d##*/}"
+ ;;
+ esac
done
- else
- mount -t tmpfs tmpfs /cow
+ # shows cow fs on /cow for use by casper-snapshot
+ mkdir -p "${rootmnt}/cow"
+ mount -o bind /cow "${rootmnt}/cow"
fi
-
- mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt"
# move the first mount; no head in busybox-initramfs
for d in $(mount -t squashfs | cut -d\ -f 3); do
mount -o move "${d}" "${rootmnt}/rofs"
break
done
+}
- if grep -q showmounts /proc/cmdline; then
- for d in $(mount -t squashfs | cut -d\ -f 3); do
- mkdir -p "${rootmnt}/casper/${d##*/}"
- mount -o move "${d}" "${rootmnt}/casper/${d##*/}"
- done
+check_dev ()
+{
+ sysdev="${1}"
+ devname="${2}"
+ if [ -z "${devname}" ]; then
+ devname=$(sys2dev "${sysdev}")
+ fi
- mkdir -p "$rootmnt/cow"
- mount -o bind /cow "$rootmnt/cow"
+ if [ -n "${LIVEMEDIA_OFFSET}" ]; then
+ loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVEMEDIA_OFFSET}")
+ devname="${loopdevname}"
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 $mountpoint
+ fi
+ fi
-is_usb_device() {
- sysfs_path="${1#/sys}"
- if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-usb)"; then
- return 0
+ if [ -n "${LIVEMEDIA_OFFSET}" ]; then
+ losetup -d "${loopdevname}"
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" ]; then
-
- # This is an ugly hack situation, the block device has
- # a squashfs image directly on it. It's hopefully
- # casper, so take it and run with it.
-
- ln -s "${devname}" "${devname}.${fstype}"
- echo "${devname}.${fstype}"
- return
+ timeout="${1}"
+ # first look at the one specified in the command line
+ if [ ! -z "${LIVEMEDIA}" ]; then
+ if check_dev "null" "${LIVEMEDIA}"; then
+ return 0
+ fi
+ fi
+ # don't start autodetection before timeout has expired
+ if [ -n "${LIVEMEDIA_TIMEOUT}" ]; then
+ if [ "${timeout}" -lt "${LIVEMEDIA_TIMEOUT}" ]; then
+ return 1
+ 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
- done
+ 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}.${fstype}"
+ return 0
+ fi
+ done
+ return 1
}
pulsate() {
exec 7>&2
exec > casper.log
exec 2>&1
-
+
set_usplash_timeout
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
pulsate
set_usplash_timeout
- 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
+ if [ ! -z "${NETBOOT}" ]; then
+ if do_netmount ; then
+ livefs_root="${mountpoint}"
+ else
+ panic "Unable to find a the network rootfs live file system"
fi
- sleep 1
- done
- if [ "$?" -gt 0 ]; then
+ else
+ # Scan local devices for the image
+ for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
+ livefs_root=$(find_livefs $i)
+ if [ "${livefs_root}" ]; then
+ break
+ fi
+ sleep 1
+ done
+ fi
+
+ if [ -z "${livefs_root}" ]; then
panic "Unable to find a medium containing a live file system"
fi
-
- mount_images_in_directory "$livefs_root" "$rootmnt"
+
+ if [ "${TORAM}" ]; then
+ live_dest="ram"
+ elif [ "${TODISK}" ]; then
+ live_dest="${TODISK}"
+ fi
+ if [ "${live_dest}" ]; then
+ log_begin_msg "Copying live_media to ${live_dest}"
+ copy_live_to "${livefs_root}" "${live_dest}"
+ log_end_msg
+ fi
+
+ mount_images_in_directory "${livefs_root}" "${rootmnt}"
+
log_end_msg
maybe_break casper-bottom
--- /dev/null
+## Casper helper functions, used by casper on boot and by casper-snapshot
+
+if [ "${BUILD_SYSTEM}" = "Ubuntu" ]; then
+ MP_QUIET="-Q"
+elif [ "${BUILD_SYSTEM}" = "Debian" ]; then
+ MP_QUIET="-q"
+else
+ MP_QUIET=""
+fi
+
+if [ ! -x "/bin/fstype" ]; then
+ # klibc not in path -> not in initramfs
+ export PATH="${PATH}:/usr/lib/klibc/bin"
+fi
+
+sys2dev() {
+ sysdev=${1#/sys}
+ echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
+}
+
+subdevices() {
+ sysblock=$1
+ r=""
+ for dev in "${sysblock}" "${sysblock}"/*; do
+ if [ -e "${dev}/dev" ]; then
+ r="${r} ${dev}"
+ fi
+ done
+ echo ${r}
+}
+
+get_fstype() {
+ 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
+}
+
+where_is_mounted() {
+ device=$1
+ if grep -q "^$device " /proc/mounts; then
+ grep "^$device " /proc/mounts | read d mountpoint rest
+ echo $mountpoint
+ return 0
+ fi
+ return 1
+}
+
+lastline() {
+ while read lines ; do
+ line=${lines}
+ done
+ echo "${line}"
+}
+
+base_path ()
+{
+ testpath="${1}"
+ mounts="$(awk '{print $2}' /proc/mounts)"
+ testpath="$(busybox realpath ${testpath})"
+
+ while true ; do
+ if echo "${mounts}" | grep -qs "^${testpath}" ; then
+ set -- `echo "${mounts}" | grep "^${testpath}" | lastline`
+ echo ${1}
+ break
+ else
+ testpath=`dirname $testpath`
+ fi
+ done
+}
+
+fs_size ()
+{
+ # Returns used/free fs kbytes + 5% more
+ # You could pass a block device as $1 or the mount point as $2
+
+ dev="${1}"
+ mountp="${2}"
+ used="${3}"
+
+ if [ -z "${mountp}" ]; then
+ mountp=$(where_is_mounted "${dev}")
+ if [ "$?" -gt 0 ]; then
+ mountp="/mnt/tmp_fs_size"
+ mkdir -p "${mountp}"
+ mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}"
+ doumount=1
+ fi
+ fi
+
+ if [ "${used}" = "used" ]; then
+ size=$(du -ks ${mountp} | cut -f1)
+ size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
+ else
+ # free space
+ size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
+ fi
+
+ if [ -n "${doumount}" ]; then
+ umount "${mountp}"
+ rmdir "${mountp}"
+ fi
+ echo "${size}"
+}
+
+setup_loop() {
+ local fspath=$1
+ local module=$2
+ local pattern=$3
+ local offset=$4
+
+ modprobe ${MP_QUIET} -b "$module"
+ udevsettle
+
+ for loopdev in $pattern; do
+ if [ "$(cat $loopdev/size)" -eq 0 ]; then
+ dev=$(sys2dev "${loopdev}")
+ if [ -n "$offset" ]; then
+ losetup -o "$offset" "$dev" "$fspath"
+ else
+ losetup "$dev" "$fspath"
+ fi
+ echo "$dev"
+ return 0
+ fi
+ done
+ panic "No loop devices available"
+}
+
+try_mount ()
+{
+ dev="${1}"
+ mountp="${2}"
+ opts="${3}"
+
+ if where_is_mounted ${dev} > /dev/null; then
+ mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
+ mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
+ else
+ mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
+ fi
+}
+
+find_cow_device() {
+ pers_label="${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 ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned
+ mkdir -p "${cow_backing}"
+ try_mount "${devname}" "${cow_backing}" "rw"
+ 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
+}
+
+find_files()
+# return the first of $filenames found on vfat and ext2 devices
+# FIXME: merge with above function
+{
+ filenames="${1}"
+ snap_backing="/snap-backing"
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
+ for dev in $(subdevices "${sysblock}"); do
+ devname=$(sys2dev "${dev}")
+ devfstype="$(get_fstype ${devname})"
+ if [ "${devfstype}" = "vfat" ] || [ "${devfstype}" = "ext2" ] ; then # FIXME: all supported block devices should be scanned
+ mkdir -p "${snap_backing}"
+ try_mount "${devname}" "${snap_backing}" "ro"
+ for filename in ${filenames}; do
+ if [ -e "${snap_backing}/${filename}" ]; then
+ echo "${devname} ${snap_backing} ${filename}"
+ return 0
+ fi
+ done
+ umount ${snap_backing}
+ fi
+ done
+ done
+}
+
+
projects / live-boot-grml.git / commitdiff