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dracut-functions.sh:check_vol_slaves() speedup LV -> VG name 

Instead of trying all /dev/mapper/* devices to match the maj:min, and
get the VG name with "lvm lvs", use the dm/name from /sys and dmsetup
splitname.

This should speedup execution with lots of LVs.
master
Harald Hoyer 2018-01-15 15:44:46 +01:00
parent b925f7f5d9
commit 9ed6eb741f
1 changed files with 29 additions and 35 deletions
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64
dracut-functions.sh
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@ -560,45 +560,39 @@ for_each_host_dev_and_slaves()
# 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 _lv _vg _pv _dm
for i in /dev/mapper/*; do
[[ $i == /dev/mapper/control ]] && continue
_lv=$(get_maj_min $i)
_dm=/sys/dev/block/$_lv/dm
[[ -f $_dm/uuid && $(<$_dm/uuid) =~ LVM-* ]] || continue
if [[ $_lv = $2 ]]; then
_vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)
# strip space
_vg="${_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
fi
done
local _lv _vg _pv _dm _majmin
_majmin="$2"
_lv="/dev/block/$_majmin"
_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 _lv _vg _pv
for i in /dev/mapper/*; do
[[ $i == /dev/mapper/control ]] && continue
_lv=$(get_maj_min $i)
if [[ $_lv = $2 ]]; then
_vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)
# strip space
_vg="${_vg//[[:space:]]/}"
if [[ $_vg ]]; then
for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2>/dev/null)
do
check_block_and_slaves_all $1 $(get_maj_min $_pv)
done
return 0
fi
fi
done
local _lv _vg _pv _majmin
_majmin="$2"
_lv="/dev/block/$_majmin"
_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_all $1 $(get_maj_min $_pv)
done
return 0
fi
return 1
}