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| -rw-r--r-- | archiso/hooks/archiso | 207 |
diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso index a129b20..b81bbf7 100644 --- a/archiso/hooks/archiso +++ b/archiso/hooks/archiso @@ -1,158 +1,165 @@ -# args: source, mountpoint -_mnt_aufs() { - src="${1}" - mnt="${2}" - msg "::: Adding new aufs branch: ${src} to ${mnt}" - mkdir -p "${mnt}" - /bin/mount -t aufs -o remount,append:"${src}"=ro none "${mnt}" +# Initialize loopback device logic (we using on-demand mode) +# args: none +_init_loop_dev() { + loop_dev_cnt=99 +} + +# Call this function before _make_loop_dev() each time. +# args: none +_next_loop_dev() { + loop_dev_cnt=$((loop_dev_cnt+1)) +} + +# Setup a loopback device for image passed as arguemnt and echo the path to loopback device used. +# args: /path/to/image_file +_make_loop_dev() { + local img="${1}" + mknod /dev/loop${loop_dev_cnt} b 7 ${loop_dev_cnt} &> /dev/null + losetup /dev/loop${loop_dev_cnt} "${img}" &> /dev/null + echo /dev/loop${loop_dev_cnt} } # args: source, mountpoint -_mnt_bind() { - src="${1}" - mnt="${2}" - msg "::: Binding ${src} to ${mnt}" +_mnt_fs() { + local img="${1}" + local mnt="${2}" + local img_fullname="${img##*/}"; + local img_name="${img_fullname%%.*}" + local ro_dev ro_dev_size ro_dev_fs_type rw_dev + mkdir -p "${mnt}" - /bin/mount -o bind "${src}" "${mnt}" + + _next_loop_dev + ro_dev=$(_make_loop_dev "${img}") + ro_dev_size=$(blockdev --getsz ${ro_dev}) + ro_dev_fs_type=$(blkid -o value -s TYPE -p ${ro_dev} 2> /dev/null) + + dd of="/cowspace/${img_name}.cow" count=0 seek=${ro_dev_size} &> /dev/null + _next_loop_dev + rw_dev=$(_make_loop_dev "/cowspace/${img_name}.cow") + + echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} N 8" | dmsetup create ${img_name} + + msg ":: Mounting '/dev/mapper/${img_name}' (${ro_dev_fs_type}) to '${mnt}'" + if ! mount -t "${ro_dev_fs_type}" "/dev/mapper/${img_name}" "${mnt}" ; then + echo "ERROR: while mounting '/dev/mapper/${img_name}' to '${mnt}'" + launch_interactive_shell + fi } # args: /path/to/image_file, mountpoint -_mnt_squashfs() { - img="${1}" - mnt="${2}" - img_fullname="${img##*/}"; - img_name="${img_fullname%.*}" - tmp_mnt="/ro_branch/${img_name}" - - if [ "${copytoram}" = "y" ]; then +_mnt_sfs() { + local img="${1}" + local mnt="${2}" + local img_fullname="${img##*/}"; + + mkdir -p "${mnt}" + + if [[ "${copytoram}" == "y" ]]; then msg -n ":: Copying squashfs image to RAM..." - /bin/cp "${img}" "/copytoram/${img_fullname}" - if [ $? -ne 0 ]; then - echo "ERROR: while copy ${img} to /copytoram/${img_fullname}" + if ! cp "${img}" "/copytoram/${img_fullname}" ; then + echo "ERROR: while copy '${img}' to '/copytoram/${img_fullname}'" launch_interactive_shell fi img="/copytoram/${img_fullname}" msg "done." fi - - mkdir -p "${tmp_mnt}" - /bin/mount -r -t squashfs "${img}" "${tmp_mnt}" - if [ $? -ne 0 ]; then - echo "ERROR: while mounting ${img} to ${tmp_mnt}" + _next_loop_dev + msg ":: Mounting '${img}' (SquashFS) to '${mnt}'" + if ! mount -r -t squashfs $(_make_loop_dev "${img}") "${mnt}" &> /dev/null ; then + echo "ERROR: while mounting '${img}' to '${mnt}'" launch_interactive_shell fi - - if [ "/${mnt#/*/}" = "/" ]; then - _mnt_aufs "${tmp_mnt}" "${mnt}" - else - _mnt_bind "${tmp_mnt}" "${mnt}" - fi } run_hook() { - if [ "x${arch}" = "x" ]; then - arch="$(uname -m)" - fi - - if [ "x${rw_branch_size}" = "x" ]; then - rw_branch_size="75%" - fi - - if [ "x${copytoram_size}" = "x" ]; then - copytoram_size="75%" - fi - - if [ "x${archisobasedir}" = "x" ]; then - archisobasedir="arch" - fi - - if [ "x${isomounts}" != "x" ]; then - isomounts="/bootmnt/${isomounts}" + [[ -z "${arch}" ]] && arch="$(uname -m)" + [[ -z "${cowspace_size}" ]] && cowspace_size="75%" + [[ -z "${copytoram_size}" ]] && copytoram_size="75%" + [[ -z "${archisobasedir}" ]] && archisobasedir="arch" + [[ -z "${archisodevice}" ]] && archisodevice="/dev/disk/by-label/${archisolabel}" + if [[ -z "${aitab}" ]]; then + aitab="/bootmnt/${archisobasedir}/aitab" else - isomounts="/bootmnt/${archisobasedir}/isomounts" + aitab="/bootmnt/${aitab}" fi - - if [ "x${archisodevice}" = "x" ]; then - archisodevice="/dev/disk/by-label/${archisolabel}" - fi - # set mount handler for archiso mount_handler="archiso_mount_handler" } +# This function is called normally from init script, but it can be called +# as chain from other mount handlers. +# args: /path/to/newroot archiso_mount_handler() { - newroot="${1}" + local newroot="${1}" + local fstype fserror + + _init_loop_dev msg ":: Waiting for boot device..." - while ! poll_device ${archisodevice} 30; do + while ! poll_device "${archisodevice}" 30; do echo "ERROR: boot device didn't show up after 30 seconds..." echo " Falling back to interactive prompt" echo " You can try to fix the problem manually, log out when you are finished" launch_interactive_shell done - FSTYPE=$(blkid -o value -s TYPE -p ${archisodevice} 2> /dev/null) - if [ -n "${FSTYPE}" ]; then - if mount -r -t "${FSTYPE}" ${archisodevice} /bootmnt > /dev/null 2>&1; then - if [ -e "${isomounts}" ]; then - echo "SUCCESS: Mounted archiso volume successfully." - fserror="0" + fstype=$(blkid -o value -s TYPE -p "${archisodevice}" 2> /dev/null) + if [[ -n "${fstype}" ]]; then + if mount -r -t "${fstype}" "${archisodevice}" /bootmnt; then + if [[ -f "${aitab}" ]]; then + msg ":: Mounted archiso volume successfully." + fserror=0 else - echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist." - fserror="1" + echo "ERROR: Mounting was successful, but the '${aitab}' file does not exist." + fserror=1 fi else - echo "ERROR; Failed to mount ${archisodevice} (FS is ${FSTYPE})" - fserror="1" + echo "ERROR; Failed to mount '${archisodevice}' (FS is ${fstype})" + fserror=1 fi else - echo "ERROR: ${archisodevice} found, but the filesystem type is unknown." - fserror="1" + echo "ERROR: '${archisodevice}' found, but the filesystem type is unknown." + fserror=1 fi - if [ "${fserror}" = "1" ]; then + if [[ ${fserror} -eq 1 ]]; then echo " Falling back to interactive prompt" echo " You can try to fix the problem manually, log out when you are finished" launch_interactive_shell fi - if [ "${copytoram}" = "y" ]; then + if [[ "${copytoram}" == "y" ]]; then msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..." mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram msg "done." fi - msg -n ":: Mounting rw_branch (tmpfs) filesystem, size=${rw_branch_size}..." - mount -t tmpfs -o "size=${rw_branch_size}",mode=0755 rw_branch /rw_branch + msg -n ":: Mounting /cowspace (tmpfs) filesystem, size=${cowspace_size}..." + mount -t tmpfs -o "size=${cowspace_size}",mode=0755 cowspace /cowspace msg "done." - msg ":: Mounting root (aufs) filesystem" - /bin/mount -t aufs -o dirs=/rw_branch=rw union "${newroot}" - if [ $? -ne 0 ]; then - echo "ERROR: while mounting root (aufs) filesystem." - launch_interactive_shell - fi - - msg ":: Mounting images" - while read img imgarch mountpoint type; do - # check if this line is a comment (starts with #) - [ "${img#"#"}" != "${img}" ] && continue - - [ "$imgarch" != "$arch" ] && continue - - [ ! -r "/bootmnt/${archisobasedir}/${img}" ] && continue - - if [ "${type}" = "bind" ]; then - _mnt_bind "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}" - elif [ "${type}" = "squashfs" ]; then - _mnt_squashfs "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}" + local aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size + while read aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size; do + [[ "${aitab_img#\#}" != "${aitab_img}" ]] && continue + [[ "${aitab_arch}" != "any" && "${aitab_arch}" != "${arch}" ]] && continue + if [[ "${aitab_fs_type}" != "none" ]]; then + if [[ "${aitab_sfs_comp}" != "none" ]]; then + _mnt_sfs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.fs.sfs" "/sfs/${aitab_img}" + _mnt_fs "/sfs/${aitab_img}/${aitab_img}.fs" "${newroot}${aitab_mnt}" + else + _mnt_fs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.fs" "${newroot}${aitab_mnt}" + fi + else + _mnt_sfs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.sfs" "${newroot}${aitab_mnt}" fi - done < "${isomounts}" + done < "${aitab}" - if [ "${copytoram}" = "y" ]; then - /bin/umount /bootmnt + if [[ "${copytoram}" == "y" ]]; then + umount /bootmnt else - _mnt_bind /bootmnt "${newroot}/bootmnt" + mkdir "${newroot}/bootmnt" + mount --bind /bootmnt "${newroot}/bootmnt" fi } |