| #!/bin/bash |
| # |
| # functions used by dracut and other tools. |
| # |
| # Copyright 2005-2009 Red Hat, Inc. All rights reserved. |
| # |
| # 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, see <http://www.gnu.org/licenses/>. |
| # |
| export LC_MESSAGES=C |
| |
| # is_func <command> |
| # Check whether $1 is a function. |
| is_func() { |
| [[ "$(type -t "$1")" == "function" ]] |
| } |
| |
| # Generic substring function. If $2 is in $1, return 0. |
| strstr() { [[ $1 == *"$2"* ]]; } |
| # Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK |
| strglobin() { [[ $1 == *$2* ]]; } |
| # Generic glob matching function. If glob pattern $2 matches all of $1, OK |
| # shellcheck disable=SC2053 |
| strglob() { [[ $1 == $2 ]]; } |
| # returns OK if $1 contains literal string $2 at the beginning, and isn't empty |
| str_starts() { [ "${1#"$2"*}" != "$1" ]; } |
| # returns OK if $1 contains literal string $2 at the end, and isn't empty |
| str_ends() { [ "${1%*"$2"}" != "$1" ]; } |
| |
| # find a binary. If we were not passed the full path directly, |
| # search in the usual places to find the binary. |
| find_binary() { |
| local _delim |
| local _path |
| local l |
| local p |
| [[ -z ${1##/*} ]] || _delim="/" |
| |
| if [[ $1 == *.so* ]]; then |
| # shellcheck disable=SC2154 |
| for l in $libdirs; do |
| _path="${l}${_delim}${1}" |
| if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then |
| printf "%s\n" "${_path}" |
| return 0 |
| fi |
| done |
| _path="${_delim}${1}" |
| if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then |
| printf "%s\n" "${_path}" |
| return 0 |
| fi |
| fi |
| if [[ $1 == */* ]]; then |
| _path="${_delim}${1}" |
| if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then |
| printf "%s\n" "${_path}" |
| return 0 |
| fi |
| fi |
| for p in $DRACUT_PATH; do |
| _path="${p}${_delim}${1}" |
| if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then |
| printf "%s\n" "${_path}" |
| return 0 |
| fi |
| done |
| |
| [[ -n $dracutsysrootdir ]] && return 1 |
| type -P "${1##*/}" |
| } |
| |
| ldconfig_paths() { |
| $DRACUT_LDCONFIG ${dracutsysrootdir:+-r ${dracutsysrootdir} -f /etc/ld.so.conf} -pN 2> /dev/null | grep -E -v '/(lib|lib64|usr/lib|usr/lib64)/[^/]*$' | sed -n 's,.* => \(.*\)/.*,\1,p' | sort | uniq |
| } |
| |
| # Version comparision function. Assumes Linux style version scheme. |
| # $1 = version a |
| # $2 = comparision op (gt, ge, eq, le, lt, ne) |
| # $3 = version b |
| vercmp() { |
| local _n1 |
| read -r -a _n1 <<< "${1//./ }" |
| local _op=$2 |
| local _n2 |
| read -r -a _n2 <<< "${3//./ }" |
| local _i _res |
| |
| for ((_i = 0; ; _i++)); do |
| if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then |
| _res=0 |
| elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then |
| _res=1 |
| elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then |
| _res=2 |
| else |
| continue |
| fi |
| break |
| done |
| |
| case $_op in |
| gt) ((_res == 1)) ;; |
| ge) ((_res != 2)) ;; |
| eq) ((_res == 0)) ;; |
| le) ((_res != 1)) ;; |
| lt) ((_res == 2)) ;; |
| ne) ((_res != 0)) ;; |
| esac |
| } |
| |
| # Create all subdirectories for given path without creating the last element. |
| # $1 = path |
| mksubdirs() { |
| # shellcheck disable=SC2174 |
| [[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}" |
| } |
| |
| # Function prints global variables in format name=value line by line. |
| # $@ = list of global variables' name |
| print_vars() { |
| local _var _value |
| |
| for _var in "$@"; do |
| eval printf -v _value "%s" \""\$$_var"\" |
| [[ ${_value} ]] && printf '%s="%s"\n' "$_var" "$_value" |
| done |
| } |
| |
| # normalize_path <path> |
| # Prints the normalized path, where it removes any duplicated |
| # and trailing slashes. |
| # Example: |
| # $ normalize_path ///test/test// |
| # /test/test |
| normalize_path() { |
| # shellcheck disable=SC2064 |
| trap "$(shopt -p extglob)" RETURN |
| shopt -q -s extglob |
| local p=${1//+(\/)//} |
| printf "%s\n" "${p%/}" |
| } |
| |
| # convert_abs_rel <from> <to> |
| # Prints the relative path, when creating a symlink to <to> from <from>. |
| # Example: |
| # $ convert_abs_rel /usr/bin/test /bin/test-2 |
| # ../../bin/test-2 |
| # $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test |
| convert_abs_rel() { |
| local __current __absolute __abssize __cursize __newpath |
| local -i __i __level |
| |
| set -- "$(normalize_path "$1")" "$(normalize_path "$2")" |
| |
| # corner case #1 - self looping link |
| [[ $1 == "$2" ]] && { |
| printf "%s\n" "${1##*/}" |
| return |
| } |
| |
| # corner case #2 - own dir link |
| [[ ${1%/*} == "$2" ]] && { |
| printf ".\n" |
| return |
| } |
| |
| IFS=/ read -r -a __current <<< "$1" |
| IFS=/ read -r -a __absolute <<< "$2" |
| |
| __abssize=${#__absolute[@]} |
| __cursize=${#__current[@]} |
| |
| while [[ ${__absolute[__level]} == "${__current[__level]}" ]]; do |
| ((__level++)) |
| if ((__level > __abssize || __level > __cursize)); then |
| break |
| fi |
| done |
| |
| for ((__i = __level; __i < __cursize - 1; __i++)); do |
| if ((__i > __level)); then |
| __newpath=$__newpath"/" |
| fi |
| __newpath=$__newpath".." |
| done |
| |
| for ((__i = __level; __i < __abssize; __i++)); do |
| if [[ -n $__newpath ]]; then |
| __newpath=$__newpath"/" |
| fi |
| __newpath=$__newpath${__absolute[__i]} |
| done |
| |
| printf -- "%s\n" "$__newpath" |
| } |
| |
| # get_fs_env <device> |
| # Get and the ID_FS_TYPE variable from udev for a device. |
| # Example: |
| # $ get_fs_env /dev/sda2 |
| # ext4 |
| get_fs_env() { |
| [[ $1 ]] || return |
| unset ID_FS_TYPE |
| ID_FS_TYPE=$(blkid -u filesystem -o export -- "$1" \ |
| | while read -r line || [ -n "$line" ]; do |
| if [[ $line == "TYPE="* ]]; then |
| printf "%s" "${line#TYPE=}" |
| exit 0 |
| fi |
| done) |
| if [[ $ID_FS_TYPE ]]; then |
| printf "%s" "$ID_FS_TYPE" |
| return 0 |
| fi |
| return 1 |
| } |
| |
| # get_maj_min <device> |
| # Prints the major and minor of a device node. |
| # Example: |
| # $ get_maj_min /dev/sda2 |
| # 8:2 |
| get_maj_min() { |
| local _majmin |
| local _out |
| |
| if [[ $get_maj_min_cache_file ]]; then |
| _out="$(grep -m1 -oP "^$1 \K\S+$" "$get_maj_min_cache_file")" |
| fi |
| |
| if ! [[ "$_out" ]]; then |
| _majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)" |
| _out="$(printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))")" |
| if [[ $get_maj_min_cache_file ]]; then |
| echo "$1 $_out" >> "$get_maj_min_cache_file" |
| fi |
| fi |
| echo -n "$_out" |
| } |
| |
| # get_devpath_block <device> |
| # get the DEVPATH in /sys of a block device |
| get_devpath_block() { |
| local _majmin _i |
| _majmin=$(get_maj_min "$1") |
| |
| for _i in /sys/block/*/dev /sys/block/*/*/dev; do |
| [[ -e $_i ]] || continue |
| if [[ $_majmin == "$(< "$_i")" ]]; then |
| printf "%s" "${_i%/dev}" |
| return 0 |
| fi |
| done |
| return 1 |
| } |
| |
| # get a persistent path from a device |
| get_persistent_dev() { |
| local i _tmp _dev _pol |
| |
| _dev=$(get_maj_min "$1") |
| [ -z "$_dev" ] && return |
| |
| if [[ -n $persistent_policy ]]; then |
| _pol="/dev/disk/${persistent_policy}/*" |
| else |
| _pol= |
| fi |
| |
| for i in \ |
| $_pol \ |
| /dev/mapper/* \ |
| /dev/disk/by-uuid/* \ |
| /dev/disk/by-label/* \ |
| /dev/disk/by-partuuid/* \ |
| /dev/disk/by-partlabel/* \ |
| /dev/disk/by-id/* \ |
| /dev/disk/by-path/*; do |
| [[ -e $i ]] || continue |
| [[ $i == /dev/mapper/control ]] && continue |
| [[ $i == /dev/mapper/mpath* ]] && continue |
| _tmp=$(get_maj_min "$i") |
| if [ "$_tmp" = "$_dev" ]; then |
| printf -- "%s" "$i" |
| return |
| fi |
| done |
| printf -- "%s" "$1" |
| } |
| |
| expand_persistent_dev() { |
| local _dev=$1 |
| |
| case "$_dev" in |
| LABEL=*) |
| _dev="/dev/disk/by-label/${_dev#LABEL=}" |
| ;; |
| UUID=*) |
| _dev="${_dev#UUID=}" |
| _dev="${_dev,,}" |
| _dev="/dev/disk/by-uuid/${_dev}" |
| ;; |
| PARTUUID=*) |
| _dev="${_dev#PARTUUID=}" |
| _dev="${_dev,,}" |
| _dev="/dev/disk/by-partuuid/${_dev}" |
| ;; |
| PARTLABEL=*) |
| _dev="/dev/disk/by-partlabel/${_dev#PARTLABEL=}" |
| ;; |
| esac |
| printf "%s" "$_dev" |
| } |
| |
| shorten_persistent_dev() { |
| local _dev="$1" |
| case "$_dev" in |
| /dev/disk/by-uuid/*) |
| printf "%s" "UUID=${_dev##*/}" |
| ;; |
| /dev/disk/by-label/*) |
| printf "%s" "LABEL=${_dev##*/}" |
| ;; |
| /dev/disk/by-partuuid/*) |
| printf "%s" "PARTUUID=${_dev##*/}" |
| ;; |
| /dev/disk/by-partlabel/*) |
| printf "%s" "PARTLABEL=${_dev##*/}" |
| ;; |
| *) |
| printf "%s" "$_dev" |
| ;; |
| esac |
| } |
| |
| # find_block_device <mountpoint> |
| # Prints the major and minor number of the block device |
| # for a given mountpoint. |
| # Unless $use_fstab is set to "yes" the functions |
| # uses /proc/self/mountinfo as the primary source of the |
| # information and only falls back to /etc/fstab, if the mountpoint |
| # is not found there. |
| # Example: |
| # $ find_block_device /usr |
| # 8:4 |
| find_block_device() { |
| local _dev _majmin _find_mpt |
| _find_mpt="$1" |
| |
| if [[ $use_fstab != yes ]]; then |
| [[ -d $_find_mpt/. ]] |
| findmnt -e -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { |
| while read -r _majmin _dev || [ -n "$_dev" ]; do |
| if [[ -b $_dev ]]; then |
| if ! [[ $_majmin ]] || [[ $_majmin == 0:* ]]; then |
| _majmin=$(get_maj_min "$_dev") |
| fi |
| if [[ $_majmin ]]; then |
| printf "%s\n" "$_majmin" |
| else |
| printf "%s\n" "$_dev" |
| fi |
| return 0 |
| fi |
| if [[ $_dev == *:* ]]; then |
| printf "%s\n" "$_dev" |
| return 0 |
| fi |
| done |
| return 1 |
| } && return 0 |
| fi |
| # fall back to /etc/fstab |
| |
| findmnt -e --fstab -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { |
| while read -r _majmin _dev || [ -n "$_dev" ]; do |
| if ! [[ $_dev ]]; then |
| _dev="$_majmin" |
| unset _majmin |
| fi |
| if [[ -b $_dev ]]; then |
| [[ $_majmin ]] || _majmin=$(get_maj_min "$_dev") |
| if [[ $_majmin ]]; then |
| printf "%s\n" "$_majmin" |
| else |
| printf "%s\n" "$_dev" |
| fi |
| return 0 |
| fi |
| if [[ $_dev == *:* ]]; then |
| printf "%s\n" "$_dev" |
| return 0 |
| fi |
| done |
| return 1 |
| } && return 0 |
| |
| return 1 |
| } |
| |
| # find_mp_fstype <mountpoint> |
| # Echo the filesystem type for a given mountpoint. |
| # /proc/self/mountinfo is taken as the primary source of information |
| # and /etc/fstab is used as a fallback. |
| # No newline is appended! |
| # Example: |
| # $ find_mp_fstype /;echo |
| # ext4 |
| find_mp_fstype() { |
| local _fs |
| |
| if [[ $use_fstab != yes ]]; then |
| findmnt -e -v -n -o 'FSTYPE' --target "$1" | { |
| while read -r _fs || [ -n "$_fs" ]; do |
| [[ $_fs ]] || continue |
| [[ $_fs == "autofs" ]] && continue |
| printf "%s" "$_fs" |
| return 0 |
| done |
| return 1 |
| } && return 0 |
| fi |
| |
| findmnt --fstab -e -v -n -o 'FSTYPE' --target "$1" | { |
| while read -r _fs || [ -n "$_fs" ]; do |
| [[ $_fs ]] || continue |
| [[ $_fs == "autofs" ]] && continue |
| printf "%s" "$_fs" |
| return 0 |
| done |
| return 1 |
| } && return 0 |
| |
| return 1 |
| } |
| |
| # find_dev_fstype <device> |
| # Echo the filesystem type for a given device. |
| # /proc/self/mountinfo is taken as the primary source of information |
| # and /etc/fstab is used as a fallback. |
| # No newline is appended! |
| # Example: |
| # $ find_dev_fstype /dev/sda2;echo |
| # ext4 |
| find_dev_fstype() { |
| local _find_dev _fs |
| _find_dev="$1" |
| if ! [[ $_find_dev == /dev* ]]; then |
| [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev" |
| fi |
| |
| if [[ $use_fstab != yes ]]; then |
| findmnt -e -v -n -o 'FSTYPE' --source "$_find_dev" | { |
| while read -r _fs || [ -n "$_fs" ]; do |
| [[ $_fs ]] || continue |
| [[ $_fs == "autofs" ]] && continue |
| printf "%s" "$_fs" |
| return 0 |
| done |
| return 1 |
| } && return 0 |
| fi |
| |
| findmnt --fstab -e -v -n -o 'FSTYPE' --source "$_find_dev" | { |
| while read -r _fs || [ -n "$_fs" ]; do |
| [[ $_fs ]] || continue |
| [[ $_fs == "autofs" ]] && continue |
| printf "%s" "$_fs" |
| return 0 |
| done |
| return 1 |
| } && return 0 |
| |
| return 1 |
| } |
| |
| # find_mp_fsopts <mountpoint> |
| # Echo the filesystem options for a given mountpoint. |
| # /proc/self/mountinfo is taken as the primary source of information |
| # and /etc/fstab is used as a fallback. |
| # No newline is appended! |
| # Example: |
| # $ find_mp_fsopts /;echo |
| # rw,relatime,discard,data=ordered |
| find_mp_fsopts() { |
| if [[ $use_fstab != yes ]]; then |
| findmnt -e -v -n -o 'OPTIONS' --target "$1" 2> /dev/null && return 0 |
| fi |
| |
| findmnt --fstab -e -v -n -o 'OPTIONS' --target "$1" |
| } |
| |
| # find_dev_fsopts <device> |
| # Echo the filesystem options for a given device. |
| # /proc/self/mountinfo is taken as the primary source of information |
| # and /etc/fstab is used as a fallback. |
| # if `use_fstab == yes`, then only `/etc/fstab` is used. |
| # |
| # Example: |
| # $ find_dev_fsopts /dev/sda2 |
| # rw,relatime,discard,data=ordered |
| find_dev_fsopts() { |
| local _find_dev |
| _find_dev="$1" |
| if ! [[ $_find_dev == /dev* ]]; then |
| [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev" |
| fi |
| |
| if [[ $use_fstab != yes ]]; then |
| findmnt -e -v -n -o 'OPTIONS' --source "$_find_dev" 2> /dev/null && return 0 |
| fi |
| |
| findmnt --fstab -e -v -n -o 'OPTIONS' --source "$_find_dev" |
| } |
| |
| # finds the major:minor of the block device backing the root filesystem. |
| find_root_block_device() { find_block_device /; } |
| |
| # for_each_host_dev_fs <func> |
| # Execute "<func> <dev> <filesystem>" for every "<dev> <fs>" pair found |
| # in ${host_fs_types[@]} |
| for_each_host_dev_fs() { |
| local _func="$1" |
| local _dev |
| local _ret=1 |
| |
| [[ "${#host_fs_types[@]}" ]] || return 2 |
| |
| for _dev in "${!host_fs_types[@]}"; do |
| $_func "$_dev" "${host_fs_types[$_dev]}" && _ret=0 |
| done |
| return $_ret |
| } |
| |
| host_fs_all() { |
| printf "%s\n" "${host_fs_types[@]}" |
| } |
| |
| # Walk all the slave relationships for a given block device. |
| # Stop when our helper function returns success |
| # $1 = function to call on every found block device |
| # $2 = block device in major:minor format |
| check_block_and_slaves() { |
| local _x |
| [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry. |
| if ! lvm_internal_dev "$2"; then "$1" "$2" && return; fi |
| check_vol_slaves "$@" && return 0 |
| if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then |
| check_block_and_slaves "$1" "$(< "/sys/dev/block/$2/../dev")" && return 0 |
| fi |
| for _x in /sys/dev/block/"$2"/slaves/*; do |
| [[ -f $_x/dev ]] || continue |
| [[ $_x/subsystem -ef /sys/class/block ]] || continue |
| check_block_and_slaves "$1" "$(< "$_x/dev")" && return 0 |
| done |
| return 1 |
| } |
| |
| check_block_and_slaves_all() { |
| local _x _ret=1 |
| [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry. |
| if ! lvm_internal_dev "$2" && "$1" "$2"; then |
| _ret=0 |
| fi |
| check_vol_slaves_all "$@" && return 0 |
| if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then |
| check_block_and_slaves_all "$1" "$(< "/sys/dev/block/$2/../dev")" && _ret=0 |
| fi |
| for _x in /sys/dev/block/"$2"/slaves/*; do |
| [[ -f $_x/dev ]] || continue |
| [[ $_x/subsystem -ef /sys/class/block ]] || continue |
| check_block_and_slaves_all "$1" "$(< "$_x/dev")" && _ret=0 |
| done |
| return $_ret |
| } |
| # for_each_host_dev_and_slaves <func> |
| # Execute "<func> <dev>" for every "<dev>" found |
| # in ${host_devs[@]} and their slaves |
| for_each_host_dev_and_slaves_all() { |
| local _func="$1" |
| local _dev |
| local _ret=1 |
| |
| [[ "${host_devs[*]}" ]] || return 2 |
| |
| for _dev in "${host_devs[@]}"; do |
| [[ -b $_dev ]] || continue |
| if check_block_and_slaves_all "$_func" "$(get_maj_min "$_dev")"; then |
| _ret=0 |
| fi |
| done |
| return $_ret |
| } |
| |
| for_each_host_dev_and_slaves() { |
| local _func="$1" |
| local _dev |
| |
| [[ "${host_devs[*]}" ]] || return 2 |
| |
| for _dev in "${host_devs[@]}"; do |
| [[ -b $_dev ]] || continue |
| check_block_and_slaves "$_func" "$(get_maj_min "$_dev")" && return 0 |
| done |
| return 1 |
| } |
| |
| # /sys/dev/block/major:minor is symbol link to real hardware device |
| # go downstream $(realpath /sys/dev/block/major:minor) to detect driver |
| get_blockdev_drv_through_sys() { |
| local _block_mods="" |
| local _path |
| |
| _path=$(realpath "$1") |
| while true; do |
| if [[ -L "$_path"/driver/module ]]; then |
| _mod=$(realpath "$_path"/driver/module) |
| _mod=$(basename "$_mod") |
| _block_mods="$_block_mods $_mod" |
| fi |
| _path=$(dirname "$_path") |
| if [[ $_path == '/sys/devices' ]] || [[ $_path == '/' ]]; then |
| break |
| fi |
| done |
| echo "$_block_mods" |
| } |
| |
| # ugly workaround for the lvm design |
| # There is no volume group device, |
| # so, there are no slave devices for volume groups. |
| # Logical volumes only have the slave devices they really live on, |
| # but you cannot create the logical volume without the volume group. |
| # And the volume group might be bigger than the devices the LV needs. |
| check_vol_slaves() { |
| local _vg _pv _dm _majmin |
| _majmin="$2" |
| _dm=/sys/dev/block/$_majmin/dm |
| [[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1 |
| _vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")") |
| # strip space |
| _vg="${_vg//[[:space:]]/}" |
| if [[ $_vg ]]; then |
| for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do |
| check_block_and_slaves "$1" "$(get_maj_min "$_pv")" && return 0 |
| done |
| fi |
| return 1 |
| } |
| |
| check_vol_slaves_all() { |
| local _vg _pv _majmin |
| _majmin="$2" |
| _dm="/sys/dev/block/$_majmin/dm" |
| [[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1 |
| _vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")") |
| # strip space |
| _vg="${_vg//[[:space:]]/}" |
| if [[ $_vg ]]; then |
| # when filter/global_filter is set, lvm may be failed |
| if ! lvm lvs --noheadings -o vg_name "$_vg" 2> /dev/null 1> /dev/null; then |
| return 1 |
| fi |
| |
| for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do |
| check_block_and_slaves_all "$1" "$(get_maj_min "$_pv")" |
| done |
| return 0 |
| fi |
| return 1 |
| } |
| |
| # fs_get_option <filesystem options> <search for option> |
| # search for a specific option in a bunch of filesystem options |
| # and return the value |
| fs_get_option() { |
| local _fsopts=$1 |
| local _option=$2 |
| local OLDIFS="$IFS" |
| IFS=, |
| # shellcheck disable=SC2086 |
| set -- $_fsopts |
| IFS="$OLDIFS" |
| while [ $# -gt 0 ]; do |
| case $1 in |
| $_option=*) |
| echo "${1#${_option}=}" |
| break |
| ;; |
| esac |
| shift |
| done |
| } |
| |
| check_kernel_config() { |
| local _config_opt="$1" |
| local _config_file |
| [[ -f $dracutsysrootdir/boot/config-$kernel ]] \ |
| && _config_file="/boot/config-$kernel" |
| [[ -f $dracutsysrootdir/lib/modules/$kernel/config ]] \ |
| && _config_file="/lib/modules/$kernel/config" |
| |
| # no kernel config file, so return true |
| [[ $_config_file ]] || return 0 |
| |
| grep -q -F "${_config_opt}=" "$dracutsysrootdir$_config_file" && return 0 |
| return 1 |
| } |
| |
| # 0 if the kernel module is either built-in or available |
| # 1 if the kernel module is not enabled |
| check_kernel_module() { |
| modprobe -S "$kernel" --dry-run "$1" &> /dev/null || return 1 |
| } |
| |
| # get_cpu_vendor |
| # Only two values are returned: AMD or Intel |
| get_cpu_vendor() { |
| if grep -qE AMD /proc/cpuinfo; then |
| printf "AMD" |
| fi |
| if grep -qE Intel /proc/cpuinfo; then |
| printf "Intel" |
| fi |
| } |
| |
| # get_host_ucode |
| # Get the hosts' ucode file based on the /proc/cpuinfo |
| get_ucode_file() { |
| local family |
| local model |
| local stepping |
| family=$(grep -E "cpu family" /proc/cpuinfo | head -1 | sed "s/.*:\ //") |
| model=$(grep -E "model" /proc/cpuinfo | grep -v name | head -1 | sed "s/.*:\ //") |
| stepping=$(grep -E "stepping" /proc/cpuinfo | head -1 | sed "s/.*:\ //") |
| |
| if [[ "$(get_cpu_vendor)" == "AMD" ]]; then |
| if [[ $family -ge 21 ]]; then |
| printf "microcode_amd_fam%xh.bin" "$family" |
| else |
| printf "microcode_amd.bin" |
| fi |
| fi |
| if [[ "$(get_cpu_vendor)" == "Intel" ]]; then |
| # The /proc/cpuinfo are in decimal. |
| printf "%02x-%02x-%02x" "${family}" "${model}" "${stepping}" |
| fi |
| } |
| |
| # Not every device in /dev/mapper should be examined. |
| # If it is an LVM device, touch only devices which have /dev/VG/LV symlink. |
| lvm_internal_dev() { |
| local dev_dm_dir=/sys/dev/block/$1/dm |
| [[ ! -f $dev_dm_dir/uuid || $(< "$dev_dm_dir"/uuid) != LVM-* ]] && return 1 # Not an LVM device |
| local DM_VG_NAME DM_LV_NAME DM_LV_LAYER |
| eval "$(dmsetup splitname --nameprefixes --noheadings --rows "$(< "$dev_dm_dir"/name)" 2> /dev/null)" |
| [[ ${DM_VG_NAME} ]] && [[ ${DM_LV_NAME} ]] || return 0 # Better skip this! |
| [[ ${DM_LV_LAYER} ]] || [[ ! -L /dev/${DM_VG_NAME}/${DM_LV_NAME} ]] |
| } |
| |
| btrfs_devs() { |
| local _mp="$1" |
| btrfs device usage "$_mp" \ |
| | while read -r _dev _; do |
| str_starts "$_dev" "/" || continue |
| _dev=${_dev%,} |
| printf -- "%s\n" "$_dev" |
| done |
| } |
| |
| iface_for_remote_addr() { |
| # shellcheck disable=SC2046 |
| set -- $(ip -o route get to "$1") |
| while [ $# -gt 0 ]; do |
| case $1 in |
| dev) |
| echo "$2" |
| return |
| ;; |
| esac |
| shift |
| done |
| } |
| |
| local_addr_for_remote_addr() { |
| # shellcheck disable=SC2046 |
| set -- $(ip -o route get to "$1") |
| while [ $# -gt 0 ]; do |
| case $1 in |
| src) |
| echo "$2" |
| return |
| ;; |
| esac |
| shift |
| done |
| } |
| |
| peer_for_addr() { |
| local addr=$1 |
| local qtd |
| |
| # quote periods in IPv4 address |
| qtd=${addr//./\\.} |
| ip -o addr show \ |
| | sed -n 's%^.* '"$qtd"' peer \([0-9a-f.:]\{1,\}\(/[0-9]*\)\?\).*$%\1%p' |
| } |
| |
| netmask_for_addr() { |
| local addr=$1 |
| local qtd |
| |
| # quote periods in IPv4 address |
| qtd=${addr//./\\.} |
| ip -o addr show | sed -n 's,^.* '"$qtd"'/\([0-9]*\) .*$,\1,p' |
| } |
| |
| gateway_for_iface() { |
| local ifname=$1 addr=$2 |
| |
| case $addr in |
| *.*) proto=4 ;; |
| *:*) proto=6 ;; |
| *) return ;; |
| esac |
| ip -o -$proto route show \ |
| | sed -n "s/^default via \([0-9a-z.:]\{1,\}\) dev $ifname .*\$/\1/p" |
| } |
| |
| # This works only for ifcfg-style network configuration! |
| bootproto_for_iface() { |
| local ifname=$1 |
| local dir |
| |
| # follow ifcfg settings for boot protocol |
| for dir in network-scripts network; do |
| [ -f "/etc/sysconfig/$dir/ifcfg-$ifname" ] && { |
| sed -n "s/BOOTPROTO=[\"']\?\([[:alnum:]]\{1,\}\)[\"']\?.*\$/\1/p" \ |
| "/etc/sysconfig/$dir/ifcfg-$ifname" |
| return |
| } |
| done |
| } |
| |
| is_unbracketed_ipv6_address() { |
| strglob "$1" '*:*' && ! strglob "$1" '\[*:*\]' |
| } |
| |
| # Create an ip= string to set up networking such that the given |
| # remote address can be reached |
| ip_params_for_remote_addr() { |
| local remote_addr=$1 |
| local ifname local_addr peer netmask gateway ifmac |
| |
| [[ $remote_addr ]] || return 1 |
| ifname=$(iface_for_remote_addr "$remote_addr") |
| [[ $ifname ]] || { |
| berror "failed to determine interface to connect to $remote_addr" |
| return 1 |
| } |
| |
| # ifname clause to bind the interface name to a MAC address |
| if [ -d "/sys/class/net/$ifname/bonding" ]; then |
| dinfo "Found bonded interface '${ifname}'. Make sure to provide an appropriate 'bond=' cmdline." |
| elif [ -e "/sys/class/net/$ifname/address" ]; then |
| ifmac=$(cat "/sys/class/net/$ifname/address") |
| [[ $ifmac ]] && printf 'ifname=%s:%s ' "${ifname}" "${ifmac}" |
| fi |
| |
| bootproto=$(bootproto_for_iface "$ifname") |
| case $bootproto in |
| dhcp | dhcp6 | auto6) ;; |
| dhcp4) |
| bootproto=dhcp |
| ;; |
| static* | "") |
| bootproto= |
| ;; |
| *) |
| derror "bootproto \"$bootproto\" is unsupported by dracut, trying static configuration" |
| bootproto= |
| ;; |
| esac |
| if [[ $bootproto ]]; then |
| printf 'ip=%s:%s ' "${ifname}" "${bootproto}" |
| else |
| local_addr=$(local_addr_for_remote_addr "$remote_addr") |
| [[ $local_addr ]] || { |
| berror "failed to determine local address to connect to $remote_addr" |
| return 1 |
| } |
| peer=$(peer_for_addr "$local_addr") |
| # Set peer or netmask, but not both |
| [[ $peer ]] || netmask=$(netmask_for_addr "$local_addr") |
| gateway=$(gateway_for_iface "$ifname" "$local_addr") |
| # Quote IPv6 addresses with brackets |
| is_unbracketed_ipv6_address "$local_addr" && local_addr="[$local_addr]" |
| is_unbracketed_ipv6_address "$peer" && peer="[$peer]" |
| is_unbracketed_ipv6_address "$gateway" && gateway="[$gateway]" |
| printf 'ip=%s:%s:%s:%s::%s:none ' \ |
| "${local_addr}" "${peer}" "${gateway}" "${netmask}" "${ifname}" |
| fi |
| |
| } |
| |
| # block_is_nbd <maj:min> |
| # Check whether $1 is an nbd device |
| block_is_nbd() { |
| [[ -b /dev/block/$1 && $1 == 43:* ]] |
| } |
| |
| # block_is_iscsi <maj:min> |
| # Check whether $1 is an nbd device |
| block_is_iscsi() { |
| local _dir |
| local _dev=$1 |
| [[ -L "/sys/dev/block/$_dev" ]] || return |
| _dir="$(readlink -f "/sys/dev/block/$_dev")" || return |
| until [[ -d "$_dir/sys" || -d "$_dir/iscsi_session" ]]; do |
| _dir="$_dir/.." |
| done |
| [[ -d "$_dir/iscsi_session" ]] |
| } |
| |
| # block_is_fcoe <maj:min> |
| # Check whether $1 is an FCoE device |
| # Will not work for HBAs that hide the ethernet aspect |
| # completely and present a pure FC device |
| block_is_fcoe() { |
| local _dir |
| local _dev=$1 |
| [[ -L "/sys/dev/block/$_dev" ]] || return |
| _dir="$(readlink -f "/sys/dev/block/$_dev")" |
| until [[ -d "$_dir/sys" ]]; do |
| _dir="$_dir/.." |
| if [[ -d "$_dir/subsystem" ]]; then |
| subsystem=$(basename "$(readlink "$_dir"/subsystem)") |
| [[ $subsystem == "fcoe" ]] && return 0 |
| fi |
| done |
| return 1 |
| } |
| |
| # block_is_netdevice <maj:min> |
| # Check whether $1 is a net device |
| block_is_netdevice() { |
| block_is_nbd "$1" || block_is_iscsi "$1" || block_is_fcoe "$1" |
| } |
| |
| # get the corresponding kernel modules of a /sys/class/*/* or/dev/* device |
| get_dev_module() { |
| local dev_attr_walk |
| local dev_drivers |
| dev_attr_walk=$(udevadm info -a "$1") |
| dev_drivers=$(echo "$dev_attr_walk" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p') |
| # if no kernel modules found and device is in a virtual subsystem, follow symlinks |
| if [[ -z $dev_drivers && $(udevadm info -q path "$1") == "/devices/virtual"* ]]; then |
| local dev_vkernel |
| local dev_vsubsystem |
| local dev_vpath |
| dev_vkernel=$(echo "$dev_attr_walk" | sed -n 's/\s*KERNELS=="\(\S\+\)"/\1/p' | tail -1) |
| dev_vsubsystem=$(echo "$dev_attr_walk" | sed -n 's/\s*SUBSYSTEMS=="\(\S\+\)"/\1/p' | tail -1) |
| dev_vpath="/sys/devices/virtual/$dev_vsubsystem/$dev_vkernel" |
| if [[ -n $dev_vkernel && -n $dev_vsubsystem && -d $dev_vpath ]]; then |
| local dev_links |
| local dev_link |
| dev_links=$(find "$dev_vpath" -maxdepth 1 -type l ! -name "subsystem" -exec readlink {} \;) |
| for dev_link in $dev_links; do |
| [[ -n $dev_drivers && ${dev_drivers: -1} != $'\n' ]] && dev_drivers+=$'\n' |
| dev_drivers+=$(udevadm info -a "$dev_vpath/$dev_link" \ |
| | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p' \ |
| | grep -v -e pcieport) |
| done |
| fi |
| fi |
| echo "$dev_drivers" |
| } |