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lvm2/test/shell/lvconvert-raid-reshape-linear_to_striped.sh
Heinz Mauelshagen 48778bc503 lvconvert: add new reporting fields for reshaping
During an ongoing reshape, the MD kernel runtime reads stripes relative
to data_offset and starts storing the reshaped stripes (with new raid
layout and/or new stripesize  and/or new number of stripes) relative
to new_data_offset.  This is to avoid writing over any data in place
which is non-atomic by nature and thus be recoverable without data loss
in the transition.  MD uses the term out-of-place reshaping for it.

There's 2 other areas we don't have report capability for:
- number of data stripes vs. total stripes
  (e.g. raid6 with 7 stripes toal has 5 data stripes)
- number of (rotating) parity/syndrome chunks
  (e.g. raid6 with 7 stripes toal has 2 parity chunks; one
   per stripe for P-Syndrome and another one for Q-Syndrome)

Thus, add the following reportable keys:

- reshape_len      (in current units)
- reshape_len_le   (in logical extents)
- data_offset      (in sectors)
- new_data_offset  (     "    )
- data_stripes
- parity_chunks

Enhance lvchange-raid.sh, lvconvert-raid-reshape-linear_to_striped.sh,
lvconvert-raid-reshape-striped_to_linear.sh, lvconvert-raid-reshape.sh
and lvconvert-raid-takeover.sh to make use of new keys.

Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
2017-03-01 18:50:35 +01:00

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#!/bin/sh
# Copyright (C) 2017 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, MA2110-1301 USA
SKIP_WITH_LVMLOCKD=1
SKIP_WITH_LVMPOLLD=1
. lib/inittest
which mkfs.ext4 || skip
aux have_raid 1 10 2 || skip
aux prepare_vg 5
#
# Test single step linear -> striped conversion
#
# Create linear LV
lvcreate -aey -L 16M -n $lv1 $vg
check lv_field $vg/$lv1 segtype "linear"
check lv_field $vg/$lv1 stripes 1
check lv_field $vg/$lv1 data_stripes 1
echo y|mkfs -t ext4 $DM_DEV_DIR/$vg/$lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
# Convert linear -> raid1
lvconvert -y -m 1 $vg/$lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
check lv_field $vg/$lv1 segtype "raid1"
check lv_field $vg/$lv1 stripes 2
check lv_field $vg/$lv1 data_stripes 2
check lv_field $vg/$lv1 regionsize "512.00k"
aux wait_for_sync $vg $lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
# Convert raid1 -> raid5_n
lvconvert -y --ty raid5_n $vg/$lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
check lv_field $vg/$lv1 segtype "raid5_n"
check lv_field $vg/$lv1 stripes 2
check lv_field $vg/$lv1 data_stripes 1
check lv_field $vg/$lv1 stripesize "64.00k"
check lv_field $vg/$lv1 regionsize "512.00k"
# Convert raid5_n adding stripes
lvconvert -y --stripes 4 $vg/$lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
check lv_first_seg_field $vg/$lv1 segtype "raid5_n"
check lv_first_seg_field $vg/$lv1 data_stripes 4
check lv_first_seg_field $vg/$lv1 stripes 5
check lv_first_seg_field $vg/$lv1 stripesize "64.00k"
check lv_first_seg_field $vg/$lv1 regionsize "512.00k"
aux wait_for_sync $vg $lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
# Convert raid5_n -> striped
lvconvert -y --type striped $vg/$lv1
fsck -fn $DM_DEV_DIR/$vg/$lv1
vgremove -ff $vg