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#!/usr/bin/env bash
# Copyright (C) 2011-2017 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# get.sh: get various values from volumes
#
# USAGE:
# get pv_field PV field [pvs params]
# get vg_field VG field [vgs params]
# get lv_field LV field [lvs params]
#
# get lv_devices LV [lvs params]
test -z "$BASH" || set -e -o pipefail
# trims only leading prefix and suffix
trim_() {
rm -f debug.log # drop log, command was ok
local var=${1%"${1##*[! ]}"} # remove trailing space characters
echo "${var#"${var%%[! ]*}"}" # remove leading space characters
}
pv_field() {
local r
r=$(pvs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
trim_ "$r"
}
vg_field() {
local r
r=$(vgs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
trim_ "$r"
}
lv_field() {
local r
r=$(lvs --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
trim_ "$r"
}
lv_first_seg_field() {
local r
r=$(head -1 < <(lvs --config 'log{prefix=""}' --unbuffered --noheadings -o "$2" "${@:3}" "$1"))
trim_ "$r"
}
lvh_field() {
local r
r=$(lvs -H --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
trim_ "$r"
}
lva_field() {
local r
r=$(lvs -a --config 'log{prefix=""}' --noheadings -o "$2" "${@:3}" "$1")
trim_ "$r"
}
lv_devices() {
lv_field "$1" devices -a "${@:2}" | sed 's/([^)]*)//g; s/,/\n/g'
}
lv_field_lv_() {
lv_field "$1" "$2" -a --unbuffered | tr -d '[]'
}
lv_tree_devices_() {
local lv="$1/$2"
local type
type=$(lv_first_seg_field "$lv" segtype -a)
#local orig
#orig=$(lv_field_lv_ "$lv" origin)
# FIXME: should we count in also origins ?
#test -z "$orig" || lv_tree_devices_ $1 $orig
case "$type" in
linear|striped)
lv_devices "$lv"
;;
mirror|raid*)
local log
log=$(lv_field_lv_ "$lv" mirror_log)
test -z "$log" || lv_tree_devices_ "$1" "$log"
for i in $(lv_devices "$lv")
do lv_tree_devices_ "$1" "$i"; done
;;
thin)
lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" pool_lv)"
;;
thin-pool)
lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" data_lv)"
lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" metadata_lv)"
;;
cache)
lv_tree_devices_ "$1" "$(lv_devices "$lv")"
;;
cache-pool)
lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" data_lv)"
lv_tree_devices_ "$1" "$(lv_field_lv_ "$lv" metadata_lv)"
;;
esac
}
lv_tree_devices() {
lv_tree_devices_ "$@" | sort | uniq
}
first_extent_sector() {
pv_field "$@" pe_start --units s --nosuffix
}
#set -x
unset LVM_VALGRIND
unset LVM_LOG_FILE_EPOCH
"$@"
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