lvm2/test/shell/lvextend-percent-extents.sh

#!/bin/sh
# Copyright (C) 2008-2011 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# 'Check extents percentage arguments'

. lib/inittest

test -e LOCAL_LVMPOLLD && skip

aux prepare_pvs 2 128
vgcreate $vg $(cat DEVICES)

lvcreate -L64 -n $lv $vg

# 'lvextend rejects both size and extents without PVs'
not lvextend -l 10 -L 64m $vg/$lv 2>err
grep "Please specify either size or extents but not both." err

# 'lvextend rejects both size and extents with PVs'
not lvextend -l 10 -L 64m $vg/$lv "$dev1" 2>err
grep "Please specify either size or extents but not both." err

# 'lvextend accepts no size or extents but one PV - bz154691'
lvextend $vg/$lv "$dev1" >out
grep "Logical volume $lv successfully resized" out
check pv_field "$dev1" pv_free "0"

lvremove -f $vg/$lv

# 'lvextend computes necessary free space correctly - bz213552'
vgsize=$(get vg_field $vg vg_extent_count)
lvcreate -l $vgsize  -n $lv $vg
lvreduce -f -l $(( $vgsize / 2 )) $vg/$lv
lvextend -l $vgsize $vg/$lv

# 'Reset LV to original size'
lvremove -f $vg/$lv
lvcreate -L 64m -n $lv $vg

# 'lvextend accepts no size but extents 100%PVS and two PVs - bz154691'
lvextend -l +100%PVS $vg/$lv "$dev1" "$dev2" >out
grep "Logical volume $lv successfully resized" out
check pv_field "$dev1" pv_free "0"
check pv_field "$dev2" pv_free "0"

# Exercise the range overlap code.  Allocate every 2 extents.
#
#      Physical Extents
#          1         2
#012345678901234567890123
#
#aaXXaaXXaaXXaaXXaaXXaaXX - (a)llocated
#rrrXXXrrrXXXrrrXXXrrrXXX - (r)ange on cmdline
#ooXXXXXXoXXXooXXXXXXoXXX - (o)verlap of range and allocated
#
# Key: a - allocated
#      F - free
#      r - part of a range on the cmdline
#      N - not on cmdline
#
# Create the LV with 12 extents, allocated every other 2 extents.
# Then extend it, with a range of PVs on the cmdline of every other 3 extents.
# Total number of extents should be 12 + overlap = 12 + 6 = 18.
# Thus, total size for the LV should be 18 * 4M = 72M
#
# 'Reset LV to 12 extents, allocate every other 2 extents'
create_pvs=$(for i in $(seq 0 4 20); do echo -n "$dev1:$i-$(($i + 1)) "; done)
lvremove -f $vg/$lv
lvcreate -l 12 -n $lv $vg $create_pvs
check lv_field $vg/$lv lv_size "48.00m"

# 'lvextend with partially allocated PVs and extents 100%PVS with PE ranges'
extend_pvs=$(for i in $(seq 0 6 18); do echo -n "$dev1:$i-$(($i + 2)) "; done)
lvextend -l +100%PVS $vg/$lv $extend_pvs >out
grep "Logical volume $lv successfully resized" out
check lv_field $vg/$lv lv_size "72.00m"

# Simple seg_count validation; initially create the LV with half the # of
# extents (should be 1 lv segment), extend it (should go to 2 segments),
# then reduce (should be back to 1)
# FIXME: test other segment fields such as seg_size, pvseg_start, pvseg_size
lvremove -f $vg/$lv
pe_count=$(get pv_field "$dev1" pv_pe_count)
pe1=$(( $pe_count / 2 ))
lvcreate -l $pe1 -n $lv $vg
pesize=$(get lv_field $vg/$lv vg_extent_size --units b --nosuffix)
segsize=$(( $pe1 * $pesize / 1024 / 1024 ))m
check lv_field $vg/$lv seg_count "1"
check lv_field $vg/$lv seg_start "0"
check lv_field $vg/$lv seg_start_pe "0"
#check lv_field $vg/$lv seg_size $segsize
lvextend -l +$(( $pe_count * 1 )) $vg/$lv
check lv_field $vg/$lv seg_count "2"
lvreduce -f -l -$(( $pe_count * 1 )) $vg/$lv
check lv_field $vg/$lv seg_count "1"

# do not reduce to 0 extents
lvremove -f $vg/$lv
lvcreate -i2 -I 64k -l10 -n $lv $vg
lvreduce -f -l1 $vg/$lv
check lv_field $vg/$lv lv_size "8.00m"