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#!/bin/bash
# Copyright (C) 2013 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
# no automatic extensions please
. lib/inittest
MKFS=mkfs.ext2
which $MKFS || skip
fill() {
dd if=/dev/zero of="$DM_DEV_DIR/${2:-$vg1/lvol0}" bs=$1 count=1 oflag=direct || \
die "Snapshot does not fit $1"
}
# Wait until device is opened
wait_for_open_() {
for i in $(seq 1 50) ; do
test $(dmsetup info --noheadings -c -o open $1) -ne 0 && return
sleep 0.1
done
die "$1 expected to be openned, but it's not!"
}
cleanup_tail()
{
test -z "$SLEEP_PID" || kill $SLEEP_PID || true
wait
vgremove -ff $vg1 || true
vgremove -ff $vg
aux teardown
}
TSIZE=15P
aux can_use_16T || TSIZE=15T
# With different snapshot target driver we may obtain different results.
# Older targets have metadata leak bug which needs extra compenstion.
# Ancient targets do not even provide separate info for metadata.
EXPECT1="16.00k"
EXPECT2="512.00k"
EXPECT3="32.00k"
EXPECT4="66.67"
if aux target_at_least dm-snapshot 1 10 0 ; then
# Extra metadata size
EXPECT4="0.00"
if aux target_at_least dm-snapshot 1 12 0 ; then
# When fixed leak, expect smaller sizes
EXPECT1="12.00k"
EXPECT2="384.00k"
EXPECT3="28.00k"
fi
fi
aux prepare_pvs 1
vgcreate -s 4M $vg $(cat DEVICES)
# Play with 1 extent
lvcreate -aey -l1 -n $lv $vg
# 100%LV is not supported for snapshot
fail lvcreate -s -l 100%LV -n snap $vg/$lv |& tee out
grep 'Please express size as %ORIGIN, %VG, %PVS, or %FREE' out
# 100%ORIGIN needs to have enough space for all data and needs to round-up
lvcreate -s -l 100%ORIGIN -n $lv1 $vg/$lv
# everything needs to fit
fill 4M $vg/$lv1
lvremove -f $vg
# Automatically activates exclusively in cluster
lvcreate -s -l 100%FREE -n $lv $vg --virtualsize $TSIZE
aux extend_filter_LVMTEST
aux lvmconf "activation/snapshot_autoextend_percent = 20" \
"activation/snapshot_autoextend_threshold = 50"
# Check usability with smallest (1k) extent size ($lv has 15P)
pvcreate --setphysicalvolumesize 4T "$DM_DEV_DIR/$vg/$lv"
trap 'cleanup_tail' EXIT
vgcreate -s 1K $vg1 "$DM_DEV_DIR/$vg/$lv"
# Play with small 1k 128 extents
lvcreate -aey -L128K -n $lv $vg1
# 100%ORIGIN needs to have enough space for all data
lvcreate -s -l 100%ORIGIN -n snap100 $vg1/$lv
# everything needs to fit
fill 128k $vg1/snap100
# 50%ORIGIN needs to have enough space for 50% of data
lvcreate -s -l 50%ORIGIN -n snap50 $vg1/$lv
fill 64k $vg1/snap50
lvcreate -s -l 25%ORIGIN -n snap25 $vg1/$lv
fill 32k $vg1/snap25
# Check we do not provide too much extra space
not fill 33k $vg1/snap25
lvs -a $vg1
lvremove -f $vg1
# Test virtual snapshot over /dev/zero
lvcreate -V50 -L10 -n $lv1 -s $vg1
CHECK_ACTIVE="active"
test ! -e LOCAL_CLVMD || CHECK_ACTIVE="local exclusive"
check lv_field $vg1/$lv1 lv_active "$CHECK_ACTIVE"
lvchange -an $vg1
# On cluster snapshot gets exclusive activation
lvchange -ay $vg1
check lv_field $vg1/$lv1 lv_active "$CHECK_ACTIVE"
# Test removal of opened (but unmounted) snapshot (device busy) for a while
sleep 120 < "$DM_DEV_DIR/$vg1/$lv1" &
SLEEP_PID=$!
wait_for_open_ "$vg1-$lv1"
# Opened virtual snapshot device is not removable
# it should retry device removal for a few seconds
not lvremove -f $vg1/$lv1
kill $SLEEP_PID
SLEEP_PID=
# Wait for killed task, so there is no device holder
wait
lvremove -f $vg1/$lv1
check lv_not_exists $vg1 $lv1
# Check border size
lvcreate -aey -L4095G $vg1
lvcreate -s -L100K $vg1/lvol0
fill 1K
check lv_field $vg1/lvol1 data_percent "12.00"
lvremove -ff $vg1
# Create 1KB snapshot, does not need to be active here
lvcreate -an -Zn -l1 -n $lv1 $vg1
not lvcreate -s -l1 $vg1/$lv1
not lvcreate -s -l3 $vg1/$lv1
lvcreate -s -l30 -n $lv2 $vg1/$lv1
check lv_field $vg1/$lv2 size "$EXPECT1"
not lvcreate -s -c512 -l512 $vg1/$lv1
lvcreate -s -c128 -l1700 -n $lv3 $vg1/$lv1
# 3 * 128
check lv_field $vg1/$lv3 size "$EXPECT2"
lvremove -ff $vg1
lvcreate -aey -l20 $vg1
lvcreate -s -l12 $vg1/lvol0
# Fill 1KB -> 100% snapshot (1x 4KB chunk)
fill 1K
check lv_field $vg1/lvol1 data_percent "100.00"
# Check it resizes 100% full valid snapshot
lvextend --use-policies $vg1/lvol1
check lv_field $vg1/lvol1 data_percent "80.00"
fill 4K
lvextend --use-policies $vg1/lvol1
check lv_field $vg1/lvol1 size "18.00k"
lvextend -l+33 $vg1/lvol1
check lv_field $vg1/lvol1 size "$EXPECT3"
fill 20K
lvremove -f $vg1
# Check snapshot really deletes COW header for read-only snapshot
# Test needs special relation between chunk size and extent size
# This test expects extent size 1K
aux lvmconf "allocation/wipe_signatures_when_zeroing_new_lvs = 1"
lvcreate -aey -L4 -n $lv $vg1
lvcreate -c 8 -s -L1 -n snap $vg1/$lv
# Populate snapshot
#dd if=/dev/urandom of="$DM_DEV_DIR/$vg1/$lv" bs=4096 count=10
$MKFS "$DM_DEV_DIR/$vg1/$lv"
lvremove -f $vg1/snap
# Undeleted header would trigger attempt to access
# beyond end of COW device
# Fails to create when chunk size is different
lvcreate -s -pr -l12 -n snap $vg1/$lv
# When header is undelete, fails to read snapshot without read errors
#dd if="$DM_DEV_DIR/$vg1/snap" of=/dev/null bs=1M count=2
fsck -n "$DM_DEV_DIR/$vg1/snap"
# This test would trigger read of weird percentage for undeleted header
# And since older snapshot target counts with metadata sectors
# we have 2 valid results (unsure about correct version number)
check lv_field $vg1/snap data_percent "$EXPECT4"
vgremove -ff $vg1
# Can't test >= 16T devices on 32bit
test "$TSIZE" = 15P || exit 0
# synchronize with udev activity
# FIXME - otherwise sequence of vgremove followed by vgcreate may fail...
# as there could be still remaing links in /dev
# Unusure if 'vgcreate' should do this type of detection in udev mode.
aux udev_wait
# Check usability with largest extent size
pvcreate "$DM_DEV_DIR/$vg/$lv"
vgcreate -s 4G $vg1 "$DM_DEV_DIR/$vg/$lv"
lvcreate -an -Zn -l50%FREE -n $lv1 $vg1
lvcreate -s -l100%FREE -n $lv2 $vg1/$lv1
check lv_field $vg1/$lv2 size "7.50p"
lvremove -ff $vg1
lvcreate -V15E -l1 -n $lv1 -s $vg1
check lv_field $vg1/$lv1 origin_size "15.00e"
vgremove -ff $vg1
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