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48778bc503
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
107 lines
3.5 KiB
Bash
107 lines
3.5 KiB
Bash
#!/bin/sh
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# Copyright (C) 2017 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA2110-1301 USA
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SKIP_WITH_LVMLOCKD=1
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SKIP_WITH_LVMPOLLD=1
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. lib/inittest
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which mkfs.ext4 || skip
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aux have_raid 1 10 2 || skip
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aux prepare_vg 5
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#
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# Test single step linear -> striped conversion
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#
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# Create 4-way striped LV
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lvcreate -aey -i 4 -I 32k -L 16M -n $lv1 $vg
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check lv_field $vg/$lv1 segtype "striped"
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check lv_field $vg/$lv1 data_stripes 4
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check lv_field $vg/$lv1 stripes 4
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check lv_field $vg/$lv1 stripesize "32.00k"
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check lv_field $vg/$lv1 reshape_len ""
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echo y|mkfs -t ext4 $DM_DEV_DIR/$vg/$lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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# Convert striped -> raid5(_n)
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lvconvert -y --ty raid5 -R 128k $vg/$lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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check lv_field $vg/$lv1 segtype "raid5_n"
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check lv_field $vg/$lv1 data_stripes 4
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check lv_field $vg/$lv1 stripes 5
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check lv_field $vg/$lv1 stripesize "32.00k"
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check lv_field $vg/$lv1 regionsize "128.00k"
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check lv_field $vg/$lv1 reshape_len ""
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aux wait_for_sync $vg $lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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# Extend raid5_n LV by factor 4 to keep size once linear
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lvresize -y -L 64 $vg/$lv1
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check lv_field $vg/$lv1 segtype "raid5_n"
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check lv_field $vg/$lv1 data_stripes 4
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check lv_field $vg/$lv1 stripes 5
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check lv_field $vg/$lv1 stripesize "32.00k"
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check lv_field $vg/$lv1 regionsize "128.00k"
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check lv_field $vg/$lv1 reshape_len ""
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aux wait_for_sync $vg $lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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# Convert raid5_n LV to 1 stripe (2 legs total),
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# 64k stripesize and 1024k regionsize
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# FIXME: "--type" superfluous (cli fix needed)
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lvconvert -y -f --ty raid5_n --stripes 1 -I 64k -R 1024k $vg/$lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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check lv_first_seg_field $vg/$lv1 segtype "raid5_n"
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check lv_first_seg_field $vg/$lv1 data_stripes 1
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check lv_first_seg_field $vg/$lv1 stripes 5
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check lv_first_seg_field $vg/$lv1 stripesize "64.00k"
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check lv_first_seg_field $vg/$lv1 regionsize "1.00m"
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check lv_first_seg_field $vg/$lv1 reshape_len 10
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# for slv in {0..4}
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# do
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# check lv_first_seg_field $vg/${lv1}_rimage_${slv} reshape_len 2
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# done
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aux wait_for_sync $vg $lv1 1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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# Remove the now freed legs
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lvconvert --stripes 1 $vg/$lv1
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check lv_first_seg_field $vg/$lv1 segtype "raid5_n"
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check lv_first_seg_field $vg/$lv1 data_stripes 1
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check lv_first_seg_field $vg/$lv1 stripes 2
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check lv_first_seg_field $vg/$lv1 stripesize "64.00k"
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check lv_first_seg_field $vg/$lv1 regionsize "1.00m"
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check lv_first_seg_field $vg/$lv1 reshape_len 4
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# Convert raid5_n to raid1
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lvconvert -y --type raid1 $vg/$lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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check lv_first_seg_field $vg/$lv1 segtype "raid1"
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check lv_first_seg_field $vg/$lv1 data_stripes 2
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check lv_first_seg_field $vg/$lv1 stripes 2
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check lv_first_seg_field $vg/$lv1 stripesize "0"
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check lv_first_seg_field $vg/$lv1 regionsize "1.00m"
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check lv_first_seg_field $vg/$lv1 reshape_len ""
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# Convert raid5_n -> linear
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lvconvert -y --type linear $vg/$lv1
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fsck -fn $DM_DEV_DIR/$vg/$lv1
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check lv_first_seg_field $vg/$lv1 segtype "linear"
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check lv_first_seg_field $vg/$lv1 data_stripes 1
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check lv_first_seg_field $vg/$lv1 stripes 1
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check lv_first_seg_field $vg/$lv1 stripesize "0"
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check lv_first_seg_field $vg/$lv1 regionsize "0"
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check lv_first_seg_field $vg/$lv1 reshape_len ""
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vgremove -ff $vg
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