| index : mkinitcpio-archiso32 | |
| Archlinux32 initcpio scripts used by archiso | gitolite user |
| summaryrefslogtreecommitdiff |
| -rw-r--r-- | hooks/archiso | 198 |
diff --git a/hooks/archiso b/hooks/archiso new file mode 100644 index 0000000..9445498 --- /dev/null +++ b/hooks/archiso @@ -0,0 +1,198 @@ +# args: source, newroot, mountpoint +_mnt_fs() { + local img="${1}" + local newroot="${2}" + local mnt="${3}" + local img_fullname="${img##*/}"; + local img_name="${img_fullname%%.*}" + local dm_snap_name="${dm_snap_prefix}_${img_name}" + local ro_dev ro_dev_size rw_dev + + ro_dev=$(losetup --find --show --read-only "${img}") + echo ${ro_dev} >> /run/archiso/used_block_devices + ro_dev_size=$(blockdev --getsz ${ro_dev}) + + if [[ "${cow_persistent}" == "P" ]]; then + if [[ -f "/run/archiso/cowspace/${cow_directory}/${img_name}.cow" ]]; then + msg ":: Found '/run/archiso/cowspace/${cow_directory}/${img_name}.cow', using as persistent." + else + msg ":: Creating '/run/archiso/cowspace/${cow_directory}/${img_name}.cow' as persistent." + dd of="/run/archiso/cowspace/${cow_directory}/${img_name}.cow" count=0 seek=${ro_dev_size} &> /dev/null + fi + else + if [[ -f "/run/archiso/cowspace/${cow_directory}/${img_name}.cow" ]]; then + msg ":: Found '/run/archiso/cowspace/${cow_directory}/${img_name}.cow' but non-persistent requested, removing." + rm -f "/run/archiso/cowspace/${cow_directory}/${img_name}.cow" + fi + msg ":: Creating '/run/archiso/cowspace/${cow_directory}/${img_name}.cow' as non-persistent." + dd of="/run/archiso/cowspace/${cow_directory}/${img_name}.cow" count=0 seek=${ro_dev_size} &> /dev/null + fi + + rw_dev=$(losetup --find --show "/run/archiso/cowspace/${cow_directory}/${img_name}.cow") + echo ${rw_dev} >> /run/archiso/used_block_devices + + echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} ${cow_persistent} 8" | dmsetup create ${dm_snap_name} + + _mnt_dev "/dev/mapper/${dm_snap_name}" "${newroot}${mnt}" "-w" + echo $(readlink -f /dev/mapper/${dm_snap_name}) >> /run/archiso/used_block_devices + echo "/dev/mapper/${dm_snap_name} ${mnt} auto defaults 0 0" >> ${newroot}/etc/fstab +} + +# args: /path/to/image_file, mountpoint +_mnt_sfs() { + local img="${1}" + local mnt="${2}" + local img_fullname="${img##*/}" + local sfs_dev + + if [[ "${copytoram}" == "y" ]]; then + msg -n ":: Copying squashfs image to RAM..." + if ! cp "${img}" "/run/archiso/copytoram/${img_fullname}" ; then + echo "ERROR: while copy '${img}' to '/run/archiso/copytoram/${img_fullname}'" + launch_interactive_shell + fi + img="/run/archiso/copytoram/${img_fullname}" + msg "done." + fi + sfs_dev=$(losetup --find --show --read-only "${img}") + echo ${sfs_dev} >> /run/archiso/used_block_devices + _mnt_dev "${sfs_dev}" "${mnt}" "-r" +} + +# args: device, mountpoint, flags +_mnt_dev() { + local dev="${1}" + local mnt="${2}" + local flg="${3}" + + mkdir -p "${mnt}" + + msg ":: Mounting '${dev}' to '${mnt}'" + + while ! poll_device "${dev}" 30; do + echo "ERROR: '${dev}' device did not show up after 30 seconds..." + echo " Falling back to interactive prompt" + echo " You can try to fix the problem manually, log out when you are finished" + launch_interactive_shell + done + + if mount "${flg}" "${dev}" "${mnt}"; then + msg ":: Device '${dev}' mounted successfully." + else + echo "ERROR; Failed to mount '${dev}'" + 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 +} + +_verify_checksum() { + local _status + cd "/run/archiso/bootmnt/${archisobasedir}" + md5sum -c checksum.${arch}.md5 > /tmp/checksum.${arch}.log 2>&1 + _status=$? + cd "${OLDPWD}" + return ${_status} +} + +run_hook() { + [[ -z "${arch}" ]] && arch="$(uname -m)" + [[ -z "${cowspace_size}" ]] && cowspace_size="75%" + [[ -z "${copytoram_size}" ]] && copytoram_size="75%" + [[ -z "${archisobasedir}" ]] && archisobasedir="arch" + [[ -z "${dm_snap_prefix}" ]] && dm_snap_prefix="arch" + [[ -z "${archisodevice}" ]] && archisodevice="/dev/disk/by-label/${archisolabel}" + + if [[ -z "${aitab}" ]]; then + aitab="/run/archiso/bootmnt/${archisobasedir}/aitab" + else + aitab="/run/archiso/bootmnt/${archisobasedir}/${aitab}" + fi + + if [[ -n "${cow_label}" ]]; then + cow_device="/dev/disk/by-label/${cow_label}" + [[ -z "${cow_persistent}" ]] && cow_persistent="P" + elif [[ -n "${cow_device}" ]]; then + [[ -z "${cow_persistent}" ]] && cow_persistent="P" + else + cow_persistent="N" + fi + + [[ -z "${cow_directory}" ]] && cow_directory="persistent_${archisolabel}/${arch}" + + # set mount handler for archiso + mount_handler="archiso_mount_handler" +} + +# This function is called normally from init script, but it can be called +# as chain from other mount handlers. +# args: /path/to/newroot +archiso_mount_handler() { + local newroot="${1}" + + if ! mountpoint -q "/run/archiso/bootmnt"; then + _mnt_dev "${archisodevice}" "/run/archiso/bootmnt" "-r" + if [[ "${copytoram}" != "y" ]]; then + echo $(readlink -f ${archisodevice}) >> /run/archiso/used_block_devices + fi + fi + + + if [[ ! -f "${aitab}" ]]; then + echo "ERROR: '${aitab}' file does not exist." + echo " Falling back to interactive prompt" + echo " You can try to fix the problem manually, log out when you are finished" + launch_interactive_shell + fi + + if [[ "${checksum}" == "y" ]]; then + if [[ -f "/run/archiso/bootmnt/${archisobasedir}/checksum.${arch}.md5" ]]; then + msg -n ":: Self-test requested, please wait..." + if _verify_checksum; then + msg "done. Checksum is OK, continue booting." + else + echo "ERROR: one or more files are corrupted" + echo "see /tmp/checksum.${arch}.log for details" + launch_interactive_shell + fi + else + echo "ERROR: checksum=y option specified but checksum.${arch}.md5 not found" + launch_interactive_shell + fi + fi + + if [[ "${copytoram}" == "y" ]]; then + msg ":: Mounting /run/archiso/copytoram (tmpfs) filesystem, size=${copytoram_size}" + mkdir -p /run/archiso/copytoram + mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /run/archiso/copytoram + fi + + if [[ -n "${cow_device}" ]]; then + _mnt_dev "${cow_device}" "/run/archiso/cowspace" "-r" + echo $(readlink -f ${cow_device}) >> /run/archiso/used_block_devices + mount -o remount,rw "/run/archiso/cowspace" + else + msg ":: Mounting /run/archiso/cowspace (tmpfs) filesystem, size=${cowspace_size}..." + mkdir -p /run/archiso/cowspace + mount -t tmpfs -o "size=${cowspace_size}",mode=0755 cowspace /run/archiso/cowspace + fi + mkdir -p "/run/archiso/cowspace/${cow_directory}" + + 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 + _mnt_sfs "/run/archiso/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.fs.sfs" "/run/archiso/sfs/${aitab_img}" + _mnt_fs "/run/archiso/sfs/${aitab_img}/${aitab_img}.fs" "${newroot}" "${aitab_mnt}" + else + _mnt_sfs "/run/archiso/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.sfs" "${newroot}${aitab_mnt}" + fi + done < "${aitab}" + + if [[ "${copytoram}" == "y" ]]; then + umount /run/archiso/bootmnt + fi +} + +# vim:ft=sh:ts=4:sw=4:et: |