refactor storage-device
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illiliti
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640ff670cf
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34f5adb14c
@ -43,5 +43,5 @@ Exceptions:
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The "mdev.conf" configuration file is modified version from "mdev-like-a-boss" project, Copyright (c) 2012-2020, Piotr Karbowski <piotr.karbowski@gmail.com>.
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Please consult the license notice in the file for terms and conditions.
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The "storage-device" script from "mdev-like-a-boss" project, Copyright (c) 2012-2020, Piotr Karbowski <piotr.karbowski@gmail.com>.
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The "storage-device" script is modified version from "mdev-like-a-boss" project, Copyright (c) 2012-2020, Piotr Karbowski <piotr.karbowski@gmail.com>.
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Please consult the license notice in the file for terms and conditions.
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144
storage-device
144
storage-device
@ -38,91 +38,97 @@
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umask 077
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storage_dir="/dev/.mdev-like-a-boss"
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[ -d "${storage_dir}" ] || mkdir "${storage_dir}"
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# TODO use /tmp
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storage_dir="/tmp/.mdev-like-a-boss"
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[ -d "$storage_dir" ] || mkdir "$storage_dir"
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[ "${MDEV}" ] || exit 2
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[ "$MDEV" ] || exit 2
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create_uuid_label_symlink() {
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local target_dir="/dev/disk/by-${1}"
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local target_symlink="${target_dir}/${2}"
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[ -e "${target_symlink}" ] && return
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mkdir -p "${target_dir}"
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ln -snf "/dev/${MDEV}" "${target_symlink}"
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echo "${target_symlink}" >"${storage_dir}/storage_symlink_${1}_${MDEV}"
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target_dir="/dev/disk/by-${1}"
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target_symlink="${target_dir}/${2}"
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[ -e "$target_symlink" ] && return
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mkdir -p "$target_dir"
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ln -sf "/dev/${MDEV}" "$target_symlink"
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printf "%s\n" "$target_symlink" > "${storage_dir}/storage_symlink_${1}_${MDEV}"
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}
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add_symlinks() {
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# Skip temp cryptsetup nodes.
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case "${MDEV}" in
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'dm-'[0-9]*)
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case "$(cat "/sys/block/${MDEV}/dm/name")" in
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'temporary-cryptsetup-'[0-9]*)
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return 0
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;;
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esac
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;;
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esac
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# Skip temp cryptsetup nodes.
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case "$MDEV" in
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"dm-"[0-9]*)
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case "$(cat "/sys/block/${MDEV}/dm/name")" in
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"temporary-cryptsetup-"[0-9]*)
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return 0
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;;
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esac
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;;
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esac
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if command -v blkid >/dev/null 2>&1; then
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local field name value UUID LABEL TYPE PTTYPE PARTUUID
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local blkid_output="$(blkid "/dev/${MDEV}")"
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eval "${blkid_output#*: }"
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if command -v blkid > /dev/null 2>&1; then
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blkid_output=$(blkid "/dev/${MDEV}")
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eval "${blkid_output#*: }"
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[ "${UUID}" ] && create_uuid_label_symlink 'uuid' "${UUID}"
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[ "${LABEL}" ] && create_uuid_label_symlink 'label' "${LABEL}"
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[ "${PARTUUID}" ] && create_uuid_label_symlink 'partuuid' "${PARTUUID}"
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fi
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[ "$UUID" ] && create_uuid_label_symlink uuid "$UUID"
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[ "$LABEL" ] && create_uuid_label_symlink label "$LABEL"
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[ "$PARTUUID" ] && create_uuid_label_symlink partuuid "$PARTUUID"
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fi
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if [ -f "/sys/block/${MDEV}/dm/name" ]; then
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[ -d '/dev/mapper' ] || mkdir '/dev/mapper'
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if ! [ -c '/dev/mapper/control' ]; then
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awk '$2 == "device-mapper" { foo = system("mknod /dev/mapper/control c 10 " $1); exit foo }' /proc/misc || exit 1
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fi
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local dmname="$(cat "/sys/block/${MDEV}/dm/name")"
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if [ "${dmname}" ]; then
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local target_symlink="/dev/mapper/${dmname}"
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[ -e "${target_symlink}" ] && return
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ln -snf "/dev/${MDEV}" "${target_symlink}"
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echo "${target_symlink}" >"${storage_dir}/storage_symlink_mapper_${MDEV}"
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fi
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fi
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if [ -f "/sys/block/${MDEV}/dm/name" ]; then
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[ -d /dev/mapper ] || mkdir /dev/mapper
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if ! [ -c /dev/mapper/control ]; then
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#awk '$2 == "device-mapper" { foo = system("mknod /dev/mapper/control c 10 " $1); exit foo }' /proc/misc || exit 1
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while read -r dm; do
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[ "${dm#* }" = device-mapper ] && {
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mknod /dev/mapper/control c 10 "${dm% *}" || exit 1
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}
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done < /proc/misc
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fi
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dmname=$(cat "/sys/block/${MDEV}/dm/name")
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if [ "$dmname" ]; then
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target_symlink="/dev/mapper/${dmname}"
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[ -e "$target_symlink" ] && return
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ln -sf "/dev/${MDEV}" "$target_symlink"
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printf "%s\n" "$target_symlink" > "${storage_dir}/storage_symlink_mapper_${MDEV}"
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fi
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fi
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}
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set_readahead() {
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read_ahead_kb_control="/sys/class/block/${MDEV}/queue/read_ahead_kb"
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new_read_ahead_kb="2048"
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if [ -f "${read_ahead_kb_control}" ]; then
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read_ahead_kb="$(cat "${read_ahead_kb_control}")"
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if [ "${read_ahead_kb}" -lt "${new_read_ahead_kb}" ]; then
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logger -t mdev "Changing ${MDEV} read_ahead_kb from ${read_ahead_kb} to ${new_read_ahead_kb}"
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echo -n "${new_read_ahead_kb}" >"${read_ahead_kb_control}"
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fi
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fi
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read_ahead_kb_control="/sys/class/block/${MDEV}/queue/read_ahead_kb"
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new_read_ahead_kb="2048"
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if [ -f "$read_ahead_kb_control" ]; then
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read_ahead_kb=$(cat "$read_ahead_kb_control")
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if [ "$read_ahead_kb" -lt "$new_read_ahead_kb" ]; then
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logger -t mdev "Changing $MDEV read_ahead_kb from $read_ahead_kb to $new_read_ahead_kb"
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printf "%s" "$new_read_ahead_kb" > "$read_ahead_kb_control"
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fi
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fi
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}
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drop_symlinks() {
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local type
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for type in uuid label mapper; do
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[ -f "${storage_dir}/storage_symlink_${type}_${MDEV}" ] || continue
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local target_symlink="$(cat "${storage_dir}/storage_symlink_${type}_${MDEV}" 2>/dev/null)"
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[ "${target_symlink}" ] || continue
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for type in uuid label mapper; do
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[ -f "${storage_dir}/storage_symlink_${type}_${MDEV}" ] || continue
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target_symlink=$(cat "${storage_dir}/storage_symlink_${type}_${MDEV}" 2> /dev/null)
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[ "$target_symlink" ] || continue
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local target_symlink_device="$(readlink "${target_symlink}")"
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if [ "${target_symlink_device}" = "/dev/${MDEV}" ]; then
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rm "${target_symlink}"
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fi
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rm "${storage_dir}/storage_symlink_${type}_${MDEV}"
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done
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target_symlink_device=$(readlink "$target_symlink")
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if [ "$target_symlink_device" = "/dev/${MDEV}" ]; then
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rm "$target_symlink"
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fi
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rm "${storage_dir}/storage_symlink_${type}_${MDEV}"
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done
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}
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case "${ACTION}" in
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'add'|'')
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add_symlinks
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set_readahead
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;;
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'remove')
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drop_symlinks
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;;
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case "$ACTION" in
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add | "")
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add_symlinks
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set_readahead
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;;
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remove)
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drop_symlinks
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;;
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esac
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