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989 lines
28 KiB
989 lines
28 KiB
#!/bin/bash |
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# |
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# functions used by dracut and other tools. |
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# |
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# Copyright 2005-2009 Red Hat, Inc. All rights reserved. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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export LC_MESSAGES=C |
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# is_func <command> |
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# Check whether $1 is a function. |
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is_func() { |
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[[ "$(type -t "$1")" == "function" ]] |
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} |
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# Generic substring function. If $2 is in $1, return 0. |
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strstr() { [[ $1 == *"$2"* ]]; } |
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# Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK |
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strglobin() { [[ $1 == *$2* ]]; } |
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# Generic glob matching function. If glob pattern $2 matches all of $1, OK |
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# shellcheck disable=SC2053 |
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strglob() { [[ $1 == $2 ]]; } |
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# returns OK if $1 contains literal string $2 at the beginning, and isn't empty |
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str_starts() { [ "${1#"$2"*}" != "$1" ]; } |
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# returns OK if $1 contains literal string $2 at the end, and isn't empty |
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str_ends() { [ "${1%*"$2"}" != "$1" ]; } |
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# find a binary. If we were not passed the full path directly, |
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# search in the usual places to find the binary. |
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find_binary() { |
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local _delim |
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local _path |
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local l |
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local p |
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[[ -z ${1##/*} ]] || _delim="/" |
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if [[ $1 == *.so* ]]; then |
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# shellcheck disable=SC2154 |
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for l in $libdirs; do |
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_path="${l}${_delim}${1}" |
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if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then |
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printf "%s\n" "${_path}" |
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return 0 |
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fi |
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done |
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_path="${_delim}${1}" |
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if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then |
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printf "%s\n" "${_path}" |
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return 0 |
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fi |
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fi |
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if [[ $1 == */* ]]; then |
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_path="${_delim}${1}" |
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if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then |
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printf "%s\n" "${_path}" |
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return 0 |
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fi |
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fi |
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for p in $DRACUT_PATH; do |
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_path="${p}${_delim}${1}" |
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if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then |
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printf "%s\n" "${_path}" |
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return 0 |
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fi |
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done |
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[[ -n $dracutsysrootdir ]] && return 1 |
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type -P "${1##*/}" |
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} |
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ldconfig_paths() { |
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$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 |
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} |
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# Version comparision function. Assumes Linux style version scheme. |
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# $1 = version a |
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# $2 = comparision op (gt, ge, eq, le, lt, ne) |
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# $3 = version b |
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vercmp() { |
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local _n1 |
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read -r -a _n1 <<< "${1//./ }" |
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local _op=$2 |
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local _n2 |
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read -r -a _n2 <<< "${3//./ }" |
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local _i _res |
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for ((_i = 0; ; _i++)); do |
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if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then |
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_res=0 |
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elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then |
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_res=1 |
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elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then |
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_res=2 |
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else |
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continue |
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fi |
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break |
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done |
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case $_op in |
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gt) ((_res == 1)) ;; |
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ge) ((_res != 2)) ;; |
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eq) ((_res == 0)) ;; |
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le) ((_res != 1)) ;; |
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lt) ((_res == 2)) ;; |
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ne) ((_res != 0)) ;; |
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esac |
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} |
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# Create all subdirectories for given path without creating the last element. |
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# $1 = path |
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mksubdirs() { |
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# shellcheck disable=SC2174 |
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[[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}" |
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} |
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# Function prints global variables in format name=value line by line. |
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# $@ = list of global variables' name |
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print_vars() { |
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local _var _value |
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for _var in "$@"; do |
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eval printf -v _value "%s" \""\$$_var"\" |
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[[ ${_value} ]] && printf '%s="%s"\n' "$_var" "$_value" |
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done |
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} |
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# normalize_path <path> |
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# Prints the normalized path, where it removes any duplicated |
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# and trailing slashes. |
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# Example: |
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# $ normalize_path ///test/test// |
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# /test/test |
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normalize_path() { |
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# shellcheck disable=SC2064 |
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trap "$(shopt -p extglob)" RETURN |
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shopt -q -s extglob |
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local p=${1//+(\/)//} |
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printf "%s\n" "${p%/}" |
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} |
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# convert_abs_rel <from> <to> |
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# Prints the relative path, when creating a symlink to <to> from <from>. |
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# Example: |
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# $ convert_abs_rel /usr/bin/test /bin/test-2 |
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# ../../bin/test-2 |
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# $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test |
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convert_abs_rel() { |
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local __current __absolute __abssize __cursize __newpath |
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local -i __i __level |
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set -- "$(normalize_path "$1")" "$(normalize_path "$2")" |
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# corner case #1 - self looping link |
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[[ $1 == "$2" ]] && { |
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printf "%s\n" "${1##*/}" |
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return |
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} |
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# corner case #2 - own dir link |
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[[ ${1%/*} == "$2" ]] && { |
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printf ".\n" |
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return |
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} |
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IFS=/ read -r -a __current <<< "$1" |
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IFS=/ read -r -a __absolute <<< "$2" |
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__abssize=${#__absolute[@]} |
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__cursize=${#__current[@]} |
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while [[ ${__absolute[__level]} == "${__current[__level]}" ]]; do |
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((__level++)) |
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if ((__level > __abssize || __level > __cursize)); then |
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break |
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fi |
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done |
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for ((__i = __level; __i < __cursize - 1; __i++)); do |
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if ((__i > __level)); then |
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__newpath=$__newpath"/" |
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fi |
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__newpath=$__newpath".." |
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done |
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for ((__i = __level; __i < __abssize; __i++)); do |
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if [[ -n $__newpath ]]; then |
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__newpath=$__newpath"/" |
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fi |
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__newpath=$__newpath${__absolute[__i]} |
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done |
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printf -- "%s\n" "$__newpath" |
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} |
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# get_fs_env <device> |
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# Get and the ID_FS_TYPE variable from udev for a device. |
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# Example: |
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# $ get_fs_env /dev/sda2 |
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# ext4 |
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get_fs_env() { |
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[[ $1 ]] || return |
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unset ID_FS_TYPE |
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ID_FS_TYPE=$(blkid -u filesystem -o export -- "$1" \ |
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| while read -r line || [ -n "$line" ]; do |
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if [[ $line == "TYPE="* ]]; then |
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printf "%s" "${line#TYPE=}" |
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exit 0 |
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fi |
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done) |
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if [[ $ID_FS_TYPE ]]; then |
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printf "%s" "$ID_FS_TYPE" |
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return 0 |
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fi |
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return 1 |
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} |
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# get_maj_min <device> |
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# Prints the major and minor of a device node. |
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# Example: |
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# $ get_maj_min /dev/sda2 |
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# 8:2 |
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get_maj_min() { |
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local _majmin |
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local _out |
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if [[ $get_maj_min_cache_file ]]; then |
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_out="$(grep -m1 -oP "^$1 \K\S+$" "$get_maj_min_cache_file")" |
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fi |
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if ! [[ "$_out" ]]; then |
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_majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)" |
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_out="$(printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))")" |
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if [[ $get_maj_min_cache_file ]]; then |
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echo "$1 $_out" >> "$get_maj_min_cache_file" |
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fi |
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fi |
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echo -n "$_out" |
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} |
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# get_devpath_block <device> |
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# get the DEVPATH in /sys of a block device |
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get_devpath_block() { |
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local _majmin _i |
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_majmin=$(get_maj_min "$1") |
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for _i in /sys/block/*/dev /sys/block/*/*/dev; do |
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[[ -e $_i ]] || continue |
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if [[ $_majmin == "$(< "$_i")" ]]; then |
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printf "%s" "${_i%/dev}" |
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return 0 |
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fi |
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done |
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return 1 |
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} |
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# get a persistent path from a device |
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get_persistent_dev() { |
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local i _tmp _dev _pol |
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_dev=$(get_maj_min "$1") |
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[ -z "$_dev" ] && return |
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if [[ -n $persistent_policy ]]; then |
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_pol="/dev/disk/${persistent_policy}/*" |
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else |
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_pol= |
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fi |
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for i in \ |
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$_pol \ |
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/dev/mapper/* \ |
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/dev/disk/by-uuid/* \ |
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/dev/disk/by-label/* \ |
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/dev/disk/by-partuuid/* \ |
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/dev/disk/by-partlabel/* \ |
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/dev/disk/by-id/* \ |
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/dev/disk/by-path/*; do |
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[[ -e $i ]] || continue |
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[[ $i == /dev/mapper/control ]] && continue |
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[[ $i == /dev/mapper/mpath* ]] && continue |
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_tmp=$(get_maj_min "$i") |
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if [ "$_tmp" = "$_dev" ]; then |
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printf -- "%s" "$i" |
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return |
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fi |
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done |
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printf -- "%s" "$1" |
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} |
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expand_persistent_dev() { |
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local _dev=$1 |
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case "$_dev" in |
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LABEL=*) |
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_dev="/dev/disk/by-label/${_dev#LABEL=}" |
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;; |
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UUID=*) |
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_dev="${_dev#UUID=}" |
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_dev="${_dev,,}" |
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_dev="/dev/disk/by-uuid/${_dev}" |
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;; |
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PARTUUID=*) |
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_dev="${_dev#PARTUUID=}" |
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_dev="${_dev,,}" |
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_dev="/dev/disk/by-partuuid/${_dev}" |
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;; |
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PARTLABEL=*) |
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_dev="/dev/disk/by-partlabel/${_dev#PARTLABEL=}" |
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;; |
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esac |
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printf "%s" "$_dev" |
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} |
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shorten_persistent_dev() { |
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local _dev="$1" |
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case "$_dev" in |
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/dev/disk/by-uuid/*) |
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printf "%s" "UUID=${_dev##*/}" |
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;; |
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/dev/disk/by-label/*) |
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printf "%s" "LABEL=${_dev##*/}" |
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;; |
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/dev/disk/by-partuuid/*) |
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printf "%s" "PARTUUID=${_dev##*/}" |
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;; |
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/dev/disk/by-partlabel/*) |
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printf "%s" "PARTLABEL=${_dev##*/}" |
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;; |
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*) |
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printf "%s" "$_dev" |
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;; |
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esac |
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} |
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# find_block_device <mountpoint> |
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# Prints the major and minor number of the block device |
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# for a given mountpoint. |
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# Unless $use_fstab is set to "yes" the functions |
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# uses /proc/self/mountinfo as the primary source of the |
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# information and only falls back to /etc/fstab, if the mountpoint |
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# is not found there. |
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# Example: |
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# $ find_block_device /usr |
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# 8:4 |
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find_block_device() { |
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local _dev _majmin _find_mpt |
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_find_mpt="$1" |
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if [[ $use_fstab != yes ]]; then |
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[[ -d $_find_mpt/. ]] |
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findmnt -e -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { |
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while read -r _majmin _dev || [ -n "$_dev" ]; do |
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if [[ -b $_dev ]]; then |
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if ! [[ $_majmin ]] || [[ $_majmin == 0:* ]]; then |
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_majmin=$(get_maj_min "$_dev") |
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fi |
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if [[ $_majmin ]]; then |
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printf "%s\n" "$_majmin" |
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else |
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printf "%s\n" "$_dev" |
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fi |
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return 0 |
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fi |
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if [[ $_dev == *:* ]]; then |
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printf "%s\n" "$_dev" |
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return 0 |
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fi |
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done |
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return 1 |
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} && return 0 |
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fi |
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# fall back to /etc/fstab |
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findmnt -e --fstab -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { |
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while read -r _majmin _dev || [ -n "$_dev" ]; do |
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if ! [[ $_dev ]]; then |
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_dev="$_majmin" |
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unset _majmin |
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fi |
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if [[ -b $_dev ]]; then |
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[[ $_majmin ]] || _majmin=$(get_maj_min "$_dev") |
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if [[ $_majmin ]]; then |
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printf "%s\n" "$_majmin" |
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else |
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printf "%s\n" "$_dev" |
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fi |
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return 0 |
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fi |
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if [[ $_dev == *:* ]]; then |
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printf "%s\n" "$_dev" |
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return 0 |
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fi |
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done |
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return 1 |
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} && return 0 |
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return 1 |
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} |
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# find_mp_fstype <mountpoint> |
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# Echo the filesystem type for a given mountpoint. |
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# /proc/self/mountinfo is taken as the primary source of information |
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# and /etc/fstab is used as a fallback. |
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# No newline is appended! |
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# Example: |
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# $ find_mp_fstype /;echo |
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# ext4 |
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find_mp_fstype() { |
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local _fs |
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if [[ $use_fstab != yes ]]; then |
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findmnt -e -v -n -o 'FSTYPE' --target "$1" | { |
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while read -r _fs || [ -n "$_fs" ]; do |
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[[ $_fs ]] || continue |
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[[ $_fs == "autofs" ]] && continue |
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printf "%s" "$_fs" |
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return 0 |
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done |
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return 1 |
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} && return 0 |
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fi |
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findmnt --fstab -e -v -n -o 'FSTYPE' --target "$1" | { |
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while read -r _fs || [ -n "$_fs" ]; do |
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[[ $_fs ]] || continue |
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[[ $_fs == "autofs" ]] && continue |
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printf "%s" "$_fs" |
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return 0 |
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done |
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return 1 |
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} && return 0 |
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return 1 |
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} |
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# find_dev_fstype <device> |
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# Echo the filesystem type for a given device. |
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# /proc/self/mountinfo is taken as the primary source of information |
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# and /etc/fstab is used as a fallback. |
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# No newline is appended! |
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# Example: |
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# $ find_dev_fstype /dev/sda2;echo |
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# ext4 |
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find_dev_fstype() { |
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local _find_dev _fs |
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_find_dev="$1" |
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if ! [[ $_find_dev == /dev* ]]; then |
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[[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev" |
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fi |
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if [[ $use_fstab != yes ]]; then |
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findmnt -e -v -n -o 'FSTYPE' --source "$_find_dev" | { |
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while read -r _fs || [ -n "$_fs" ]; do |
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[[ $_fs ]] || continue |
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[[ $_fs == "autofs" ]] && continue |
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printf "%s" "$_fs" |
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return 0 |
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done |
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return 1 |
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} && return 0 |
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fi |
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findmnt --fstab -e -v -n -o 'FSTYPE' --source "$_find_dev" | { |
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while read -r _fs || [ -n "$_fs" ]; do |
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[[ $_fs ]] || continue |
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[[ $_fs == "autofs" ]] && continue |
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printf "%s" "$_fs" |
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return 0 |
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done |
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return 1 |
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} && return 0 |
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return 1 |
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} |
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# find_mp_fsopts <mountpoint> |
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# Echo the filesystem options for a given mountpoint. |
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# /proc/self/mountinfo is taken as the primary source of information |
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# and /etc/fstab is used as a fallback. |
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# No newline is appended! |
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# Example: |
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# $ find_mp_fsopts /;echo |
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# rw,relatime,discard,data=ordered |
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find_mp_fsopts() { |
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if [[ $use_fstab != yes ]]; then |
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findmnt -e -v -n -o 'OPTIONS' --target "$1" 2> /dev/null && return 0 |
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fi |
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findmnt --fstab -e -v -n -o 'OPTIONS' --target "$1" |
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} |
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|
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# find_dev_fsopts <device> |
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# Echo the filesystem options for a given device. |
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# /proc/self/mountinfo is taken as the primary source of information |
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# and /etc/fstab is used as a fallback. |
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# if `use_fstab == yes`, then only `/etc/fstab` is used. |
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# |
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# Example: |
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# $ find_dev_fsopts /dev/sda2 |
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# rw,relatime,discard,data=ordered |
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find_dev_fsopts() { |
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local _find_dev |
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_find_dev="$1" |
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if ! [[ $_find_dev == /dev* ]]; then |
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[[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev" |
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fi |
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if [[ $use_fstab != yes ]]; then |
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findmnt -e -v -n -o 'OPTIONS' --source "$_find_dev" 2> /dev/null && return 0 |
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fi |
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findmnt --fstab -e -v -n -o 'OPTIONS' --source "$_find_dev" |
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} |
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# finds the major:minor of the block device backing the root filesystem. |
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find_root_block_device() { find_block_device /; } |
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|
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# for_each_host_dev_fs <func> |
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# Execute "<func> <dev> <filesystem>" for every "<dev> <fs>" pair found |
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# in ${host_fs_types[@]} |
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for_each_host_dev_fs() { |
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local _func="$1" |
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local _dev |
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local _ret=1 |
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[[ "${#host_fs_types[@]}" ]] || return 2 |
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for _dev in "${!host_fs_types[@]}"; do |
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$_func "$_dev" "${host_fs_types[$_dev]}" && _ret=0 |
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done |
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return $_ret |
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} |
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host_fs_all() { |
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printf "%s\n" "${host_fs_types[@]}" |
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} |
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|
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# Walk all the slave relationships for a given block device. |
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# Stop when our helper function returns success |
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# $1 = function to call on every found block device |
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# $2 = block device in major:minor format |
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check_block_and_slaves() { |
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local _x |
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[[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry. |
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if ! lvm_internal_dev "$2"; then "$1" "$2" && return; fi |
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check_vol_slaves "$@" && return 0 |
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if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then |
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check_block_and_slaves "$1" "$(< "/sys/dev/block/$2/../dev")" && return 0 |
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fi |
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for _x in /sys/dev/block/"$2"/slaves/*; do |
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[[ -f $_x/dev ]] || continue |
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[[ $_x/subsystem -ef /sys/class/block ]] || continue |
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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" |
|
}
|
|
|