lvm2/test/t-metadata-balance.sh

# Copyright (C) 2008 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

. ./test-utils.sh

aux prepare_devs 6

echo Make sure we can ignore / un-ignore mdas on a per-PV basis
for pv_in_vg in 1 0; do
for mdacp in 1 2; do
	pvcreate --metadatacopies $mdacp $dev1 $dev2
        pvcreate --metadatacopies 0 $dev3
	if [ $pv_in_vg = 1 ]; then
		vgcreate -c n "$vg" $dev1 $dev2 $dev3
	fi
	pvchange --metadataignore y $dev1
	check_pv_field_ $dev1 pv_mda_count $mdacp
	check_pv_field_ $dev1 pv_mda_used_count 0
	check_pv_field_ $dev2 pv_mda_count $mdacp
	check_pv_field_ $dev2 pv_mda_used_count $mdacp
	if [ $pv_in_vg = 1 ]; then
		check_vg_field_ $vg vg_mda_count $(($mdacp * 2))
		check_vg_field_ $vg vg_mda_used_count $mdacp
		check_vg_field_ $vg vg_mda_copies unmanaged
	fi
	pvchange --metadataignore n $dev1
	check_pv_field_ $dev1 pv_mda_count $mdacp
	check_pv_field_ $dev1 pv_mda_used_count $mdacp
	if [ $pv_in_vg = 1 ]; then
		check_vg_field_ $vg vg_mda_count $(($mdacp * 2))
		check_vg_field_ $vg vg_mda_used_count $(($mdacp * 2))
		check_vg_field_ $vg vg_mda_copies unmanaged
		vgremove -f $vg
	fi
done
done

# Check if a PV has unignored (used) mdas, and if so, ignore
pvignore_ () {
	pv_mda_used_count=$(get_pv_field "$1" pv_mda_used_count)
	if [ $pv_mda_used_count -ne 0 ]; then
	    pvchange --metadataignore y $1
	fi
}

# Check if a PV has ignored mdas, and if so, unignore (make used)
pvunignore_ () {
	pv_mda_count=$(get_pv_field "$1" pv_mda_count)
	pv_mda_used_count=$(get_pv_field "$1" pv_mda_used_count)
	if [ $pv_mda_count -gt $pv_mda_used_count ]; then
	    pvchange --metadataignore n $1
	fi
}

echo Test of vgmetadatacopies with vgcreate and vgchange
for mdacp in 1 2; do
	pvcreate --metadatacopies $mdacp $dev1 $dev2 $dev4 $dev5
	check_pv_field_ $dev1 pv_mda_used_count $mdacp
	check_pv_field_ $dev2 pv_mda_used_count $mdacp
	check_pv_field_ $dev4 pv_mda_used_count $mdacp
	check_pv_field_ $dev5 pv_mda_used_count $mdacp
	pvcreate --metadatacopies 0 $dev3
	vgcreate -c n "$vg" $dev1 $dev2 $dev3
	check_vg_field_ $vg vg_mda_copies unmanaged
	echo ensure both --vgmetadatacopies and --metadatacopies accepted
	vgchange --metadatacopies $(($mdacp * 1)) $vg
	echo --vgmetadatacopies is persistent on disk
	echo --vgmetadatacopies affects underlying pv mda ignore
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 1))
	check_vg_field_ $vg vg_mda_used_count $(($mdacp * 1))
	vgchange --vgmetadatacopies $(($mdacp * 2)) $vg
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 2))
	check_vg_field_ $vg vg_mda_used_count $(($mdacp * 2))
	echo allow setting metadatacopies larger than number of PVs
	vgchange --vgmetadatacopies $(($mdacp * 5)) $vg
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 5))
	check_vg_field_ $vg vg_mda_used_count $(($mdacp * 2))
	echo setting to 0 disables automatic balancing
	vgchange --vgmetadatacopies unmanaged $vg
	check_vg_field_ $vg vg_mda_copies unmanaged
	vgremove -f $vg
	echo vgcreate succeeds even when creating a VG w/all ignored mdas
	pvchange --metadataignore y $dev1 $dev2
	check_pv_field_ $dev1 pv_mda_count $mdacp
	check_pv_field_ $dev2 pv_mda_used_count 0
	vgcreate -c n "$vg" $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies unmanaged
	vgremove -f $vg
	echo vgcreate succeeds with a specific number of metadata copies
	vgcreate -c n --vgmetadatacopies $(($mdacp * 2)) "$vg" $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 2))
	vgremove -f $vg
	vgcreate -c n --vgmetadatacopies $(($mdacp * 1)) "$vg" $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 1))
	vgremove -f $vg
	echo vgcreate succeeds with a larger value than total metadatacopies
	vgcreate -c n --vgmetadatacopies $(($mdacp * 5)) "$vg" $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 5))
	vgremove -f $vg
	echo vgcreate succeeds with --vgmetadatacopies unmanaged
	vgcreate -c n --vgmetadatacopies unmanaged "$vg" $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies unmanaged
	vgremove -f $vg
	pvunignore_ $dev1
	pvunignore_ $dev2
	pvunignore_ $dev4
	pvunignore_ $dev5
	echo vgcreate succeds with small value of --metadatacopies, ignores mdas
	vgcreate -c n --vgmetadatacopies 1 "$vg" $dev1 $dev2 $dev4 $dev5
	check_vg_field_ $vg vg_mda_copies 1
	check_vg_field_ $vg vg_mda_count $(($mdacp * 4))
	check_vg_field_ $vg vg_mda_used_count 1
	echo Setting a larger value should trigger non-ignore of mdas
	vgchange --metadatacopies 3 $vg
	check_vg_field_ $vg vg_mda_copies 3
	check_vg_field_ $vg vg_mda_used_count 3
	echo Setting all should trigger unignore of all mdas
	vgchange --vgmetadatacopies all $vg
	check_vg_field_ $vg vg_mda_count $(($mdacp * 4))
	check_vg_field_ $vg vg_mda_copies unmanaged
	check_vg_field_ $vg vg_mda_used_count $(($mdacp * 4))
	echo --vgmetadatacopies 0 should be rejected for vgchange and vgcreate
	not vgchange --vgmetadatacopies 0 $vg
	vgremove -f $vg
	not vgcreate -c n --vgmetadatacopies 0 "$vg" $dev1 $dev2 $dev4 $dev5
done

echo Test vgextend / vgreduce with vgmetadatacopies
for mdacp in 1 2; do
	pvcreate --metadatacopies $mdacp $dev1 $dev2 $dev4 $dev5
	pvcreate --metadatacopies 0 $dev3
	echo Set a large value of vgmetadatacopies
	vgcreate -c n --vgmetadatacopies $(($mdacp * 5)) "$vg" $dev1 $dev2 $dev3
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 5))
	echo Ignore mdas on devices to be used for vgextend
	echo Large value of vgetadatacopies should automatically un-ignore mdas
	pvchange --metadataignore y $dev4 $dev5
	check_pv_field_ $dev4 pv_mda_used_count 0
	vgextend $vg $dev4 $dev5
	check_pv_field_ $dev4 pv_mda_used_count $mdacp
	check_pv_field_ $dev5 pv_mda_used_count $mdacp
	vgremove -f $vg
	echo Set a small value of vgmetadatacopies
	vgcreate -c n --vgmetadatacopies $(($mdacp * 1)) "$vg" $dev1 $dev2 $dev3
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 1))
	echo Ignore mdas on devices to be used for vgextend
	echo Small value of vgetadatacopies should leave mdas as ignored
	pvchange --metadataignore y $dev4 $dev5
	check_pv_field_ $dev4 pv_mda_used_count 0
	vgextend $vg $dev4 $dev5
	check_pv_field_ $dev4 pv_mda_used_count 0
	check_pv_field_ $dev5 pv_mda_used_count 0
	echo vgreduce of ignored pv w/mda should not trigger any change to ignore bits
	vgreduce $vg $dev4
	check_pv_field_ $dev4 pv_mda_used_count 0
	check_pv_field_ $dev5 pv_mda_used_count 0
	echo vgreduce of un-ignored pv w/mda should trigger un-ignore on an mda
	vgreduce $vg $dev1 $dev2 $dev3
	check_pv_field_ $dev5 pv_mda_used_count $mdacp
	check_vg_field_ $vg vg_mda_copies $(($mdacp * 1))
	pvunignore_ $dev1
	pvunignore_ $dev2
	echo setting vgmetadatacopies to unmanaged should allow vgextend to add w/out balancing
	vgchange --vgmetadatacopies unmanaged $vg
	vgextend $vg $dev1 $dev2
	check_vg_field_ $vg vg_mda_copies unmanaged
	check_vg_field_ $vg vg_mda_count $(($mdacp * 3))
	check_vg_field_ $vg vg_mda_used_count $((mdacp * 3))
	check_pv_field_ $dev1 pv_mda_used_count $mdacp
	check_pv_field_ $dev2 pv_mda_used_count $mdacp
	vgremove -f $vg
done

echo Test special situations, vgsplit, vgmerge, etc
for mdacp in 1 2; do
	pvcreate --metadatacopies $mdacp $dev1 $dev2 $dev3 $dev4 $dev5
	vgcreate -c n --vgmetadatacopies 2 $vg1 $dev1 $dev2 $dev3
	vgcreate -c n --vgmetadatacopies $(($mdacp * 1)) $vg2 $dev4 $dev5
	echo vgsplit/vgmerge preserves value of metadata copies
	check_vg_field_ $vg1 vg_mda_copies 2
	check_vg_field_ $vg2 vg_mda_copies $(($mdacp * 1))
	vgsplit $vg1 $vg2 $dev1
	check_vg_field_ $vg2 vg_mda_copies $(($mdacp * 1))
	vgmerge $vg1 $vg2
	check_vg_field_ $vg1 vg_mda_copies 2
	check_vg_field_ $vg1 vg_mda_count $(($mdacp * 5))
	echo vgsplit into new vg sets proper value of vgmetadatacopies
	vgsplit --vgmetadatacopies $(($mdacp * 2)) $vg1 $vg2 $dev1 $dev2
	check_vg_field_ $vg2 vg_mda_copies $(($mdacp * 2))
	echo vgchange fails if given both vgmetadatacopies and metadatacopies
	not vgchange --vgmetadatacopies 5 --metadatacopies 7 $vg2
	vgremove -f $vg1
	vgremove -f $vg2
done

echo Test combination of --vgmetadatacopies and pvchange --metadataignore
for mdacp in 1 2; do
	pvcreate --metadatacopies $mdacp $dev1 $dev2 $dev3 $dev4 $dev5
	vgcreate -c n --vgmetadatacopies $(($mdacp * 1)) $vg1 $dev1 $dev2
	check_vg_field_ $vg1 vg_mda_copies $(($mdacp * 1))
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 1))
	pvignore_ $dev3
	echo Ensure vgextend of PVs with ignored MDAs does not add to vg_mda_used_count
	vgextend $vg1 $dev3
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 1))
	echo Using pvchange to unignore should update vg_mda_used_count
	pvchange --metadataignore n $dev3
	check_pv_field_ $dev3 pv_mda_used_count $mdacp
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 2))
	echo Set unmanaged on the vg should keep ignore bits the same during vgextend
	vgchange --vgmetadatacopies unmanaged $vg1
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 2))
	pvunignore_ $dev4
	vgextend $vg1 $dev4
	check_pv_field_ $dev4 pv_mda_used_count $mdacp
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 3))
	echo Using pvchange to ignore should update vg_mda_used_count
	pvchange --metadataignore y $dev4
	check_pv_field_ $dev4 pv_mda_used_count 0
	check_vg_field_ $vg1 vg_mda_used_count $(($mdacp * 2))
	vgremove -f $vg1
done