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8e5305f630
This is somewhat tricky - for test suite we keep using 'set -e -o pipefail' - the effect here is - we get error report from any 'failing' command in whole pipeline - thus when something like this: 'lvs | head -1' is used - and 'head' finishes before lead 'lvs' is done - it recieves SIGPIPE and exits with error, and somewhat misleading gets occasionally reported depending of speed of commands. For this case we have to avoid using standard pipes and rather switch to using streamed results with temporary output file. This is all nicely handled with bash feature '< <()'. For more info: https://stackoverflow.com/questions/41516177/bash-zcat-head-causes-pipefail
122 lines
2.8 KiB
Bash
122 lines
2.8 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2011-2017 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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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, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# get.sh: get various values from volumes
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#
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# USAGE:
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# get pv_field PV field [pvs params]
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# get vg_field VG field [vgs params]
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# get lv_field LV field [lvs params]
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#
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# get lv_devices LV [lvs params]
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test -z "$BASH" || set -e -o pipefail
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# trims only leading prefix and suffix
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trim_() {
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rm -f debug.log # drop log, command was ok
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local var=${1%${1##*[! ]}} # remove trailing space characters
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echo "${var#${var%%[! ]*}}" # remove leading space characters
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}
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pv_field() {
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local r
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r=$(pvs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
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trim_ "$r"
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}
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vg_field() {
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local r
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r=$(vgs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
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trim_ "$r"
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}
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lv_field() {
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local r
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r=$(lvs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
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trim_ "$r"
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}
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lv_first_seg_field() {
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local r
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r=$(head -1 < <(lvs --config 'log{prefix=""}' --unbuffered --noheadings -o "$2" "${@:3}" "$1"))
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trim_ "$r"
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}
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lvh_field() {
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local r
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r=$(lvs -H --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
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trim_ "$r"
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}
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lva_field() {
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local r
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r=$(lvs -a --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
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trim_ "$r"
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}
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lv_devices() {
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lv_field "$1" devices -a "${@:2}" | sed 's/([^)]*)//g; s/,/\n/g'
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}
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lv_field_lv_() {
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lv_field "$1" "$2" -a --unbuffered | tr -d []
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}
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lv_tree_devices_() {
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local lv="$1/$2"
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local type
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type=$(lv_first_seg_field "$lv" segtype -a)
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#local orig
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#orig=$(lv_field_lv_ "$lv" origin)
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# FIXME: should we count in also origins ?
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#test -z "$orig" || lv_tree_devices_ $1 $orig
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case "$type" in
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linear|striped)
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lv_devices "$lv"
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;;
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mirror|raid*)
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local log
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log=$(lv_field_lv_ "$lv" mirror_log)
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test -z "$log" || lv_tree_devices_ "$1" "$log"
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for i in $(lv_devices "$lv")
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do lv_tree_devices_ "$1" "$i"; done
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;;
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thin)
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lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" pool_lv)"
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;;
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thin-pool)
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lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" data_lv)"
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lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" metadata_lv)"
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;;
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cache)
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lv_tree_devices_ "$1" "$(lv_devices "$lv")"
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;;
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cache-pool)
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lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" data_lv)"
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lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" metadata_lv)"
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;;
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esac
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}
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lv_tree_devices() {
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lv_tree_devices_ "$@" | sort | uniq
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}
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first_extent_sector() {
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pv_field "$@" pe_start --units s --nosuffix
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}
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#set -x
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unset LVM_VALGRIND
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unset LVM_LOG_FILE_EPOCH
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"$@"
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