tests: add writecache-split

test/shell/writecache-split.sh

@@ -0,0 +1,128 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2018 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
+
+# Test single lv cache options
+
+SKIP_WITH_LVMPOLLD=1
+
+. lib/inittest
+
+mkfs_mount_umount()
+{
+        lvt=$1
+
+        lvchange -ay $vg/$lvt
+
+        mkfs.xfs -f -s size=4096 "$DM_DEV_DIR/$vg/$lvt"
+        mount "$DM_DEV_DIR/$vg/$lvt" "$mount_dir"
+        cp pattern1 "$mount_dir/pattern1"
+        dd if=/dev/zero of="$mount_dir/zeros2M" bs=1M count=32 conv=fdatasync
+        umount "$mount_dir"
+
+        lvchange -an $vg/$lvt
+}
+
+mount_umount()
+{
+        lvt=$1
+
+        lvchange -ay $vg/$lvt
+
+        mount "$DM_DEV_DIR/$vg/$lvt" "$mount_dir"
+        diff pattern1 "$mount_dir/pattern1"
+        dd if="$mount_dir/zeros2M" of=/dev/null bs=1M count=32
+        umount "$mount_dir"
+
+        lvchange -an $vg/$lvt
+}
+
+aux have_cache 1 10 0 || skip
+which mkfs.xfs || skip
+
+mount_dir="mnt"
+mkdir -p "$mount_dir"
+
+# generate random data
+dd if=/dev/urandom of=pattern1 bs=512K count=1
+
+aux prepare_devs 4
+
+vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3" "$dev4"
+
+lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
+lvcreate -n $lv2 -l 4 -an $vg "$dev2"
+
+#
+# split when no devs are missing
+#
+
+lvconvert -y --type writecache --cachevol $lv2 $vg/$lv1
+
+mkfs_mount_umount $lv1
+
+lvconvert --splitcache $vg/$lv1
+lvs -o segtype $vg/$lv1 | grep linear
+lvs -o segtype $vg/$lv2 | grep linear
+
+mount_umount $lv1
+
+#
+# split while cachevol is missing
+#
+
+lvconvert -y --type writecache --cachevol $lv2 $vg/$lv1
+
+mkfs_mount_umount $lv1
+
+aux disable_dev "$dev2"
+
+not lvconvert --splitcache $vg/$lv1
+lvconvert --splitcache --force --yes $vg/$lv1
+
+lvs -o segtype $vg/$lv1 | grep linear
+
+aux enable_dev "$dev2"
+lvs -o segtype $vg/$lv2 | grep linear
+
+vgck --updatemetadata $vg
+lvs $vg
+vgchange -an $vg
+vgextend --restoremissing $vg "$dev2"
+
+
+#
+# split while cachevol has 1 of 2 PVs
+#
+
+lvremove $vg/$lv2
+lvcreate -n $lv2 -l 14 -an $vg "$dev2" "$dev3"
+
+lvconvert -y --type writecache --cachevol $lv2 $vg/$lv1
+
+mkfs_mount_umount $lv1
+
+aux disable_dev "$dev3"
+
+not lvconvert --splitcache $vg/$lv1
+lvconvert --splitcache --force --yes $vg/$lv1
+
+lvs -o segtype $vg/$lv1 | grep linear
+
+aux enable_dev "$dev3"
+lvs -o segtype $vg/$lv2 | grep linear
+
+vgck --updatemetadata $vg
+lvs $vg
+vgchange -an $vg
+vgextend --restoremissing $vg "$dev3"
+
+vgremove -ff $vg