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5555d2a000
Commit 8767435ef8 allowed RAID 4/5/6
LV to be extended properly, but introduced a regression in device
replacement - a critical component of fault tolerance.
When only 1 or 2 drives are being replaced, the 'area_count' needed
can be equal to the parity_count. The 'area_multiple' for RAID 4/5/6
was computed as 'area_count - parity_devs', which could result in
'area_multiple' being 0. This would ultimately lead to a division by
zero error. Therefore, in calc_area_multiple, it is important to take
into account the number of areas that are being requested - just as
we already do in _alloc_init.
139 lines
3.7 KiB
Bash
139 lines
3.7 KiB
Bash
#!/bin/sh
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# Copyright (C) 2008 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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. lib/test
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recreate_vg_()
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{
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vgremove -ff $vg
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vgcreate -c n $vg $(cat DEVICES)
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}
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aux lvmconf 'allocation/maximise_cling = 0'
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aux lvmconf 'allocation/mirror_logs_require_separate_pvs = 1'
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# fail multiple devices
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# 4-way, disk log => 2-way, disk log
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aux prepare_vg 8
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lvcreate -m 3 --ig -L 1 -n 4way $vg "$dev1" "$dev2" "$dev3" "$dev4" "$dev5":0
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aux disable_dev "$dev2" "$dev4"
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echo n | lvconvert --repair $vg/4way 2>&1 | tee 4way.out
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lvs -a -o +devices $vg | not grep unknown
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vgreduce --removemissing $vg
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aux enable_dev "$dev2" "$dev4"
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check mirror $vg 4way "$dev5"
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# 3-way, disk log => linear
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recreate_vg_
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lvcreate -m 2 --ig -L 1 -n 3way $vg
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aux disable_dev "$dev1" "$dev2"
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echo n | lvconvert --repair $vg/3way
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check linear $vg 3way
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lvs -a -o +devices $vg | not grep unknown
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lvs -a -o +devices $vg | not grep mlog
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dmsetup ls | grep $PREFIX | not grep mlog
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vgreduce --removemissing $vg
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aux enable_dev "$dev1" "$dev2"
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check linear $vg 3way
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# fail just log and get it removed
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# 3-way, disk log => 3-way, core log
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recreate_vg_
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lvcreate -m 2 --ig -L 1 -n 3way $vg "$dev1" "$dev2" "$dev3" "$dev4":0
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aux disable_dev "$dev4"
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echo n | lvconvert --repair $vg/3way
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check mirror $vg 3way core
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lvs -a -o +devices $vg | not grep unknown
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lvs -a -o +devices $vg | not grep mlog
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dmsetup ls | grep $PREFIX | not grep mlog
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vgreduce --removemissing $vg
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aux enable_dev "$dev4"
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# 3-way, mirrored log => 3-way, core log
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recreate_vg_
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lvcreate -m 2 --mirrorlog mirrored --ig -L 1 -n 3way $vg \
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"$dev1" "$dev2" "$dev3" "$dev4":0 "$dev5":0
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aux disable_dev "$dev4" "$dev5"
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echo n | lvconvert --repair $vg/3way
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check mirror $vg 3way core
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lvs -a -o +devices $vg | not grep unknown
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lvs -a -o +devices $vg | not grep mlog
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dmsetup ls | grep $PREFIX | not grep mlog
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vgreduce --removemissing $vg
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aux enable_dev "$dev4" "$dev5"
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# 2-way, disk log => 2-way, core log
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recreate_vg_
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lvcreate -m 1 --ig -L 1 -n 2way $vg "$dev1" "$dev2" "$dev3":0
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aux disable_dev "$dev3"
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echo n | lvconvert --repair $vg/2way
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check mirror $vg 2way core
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lvs -a -o +devices $vg | not grep unknown
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lvs -a -o +devices $vg | not grep mlog
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vgreduce --removemissing $vg
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aux enable_dev "$dev3"
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# fail single devices
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recreate_vg_
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vgreduce $vg "$dev4"
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lvcreate -m 1 --ig -L 1 -n mirror $vg
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lvchange -a n $vg/mirror
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vgextend $vg "$dev4"
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aux disable_dev "$dev1"
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lvchange --partial -a y $vg/mirror
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not vgreduce -v --removemissing $vg
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lvconvert -y --repair $vg/mirror
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vgreduce --removemissing $vg
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aux enable_dev "$dev1"
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vgextend $vg "$dev1"
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aux disable_dev "$dev2"
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lvconvert -y --repair $vg/mirror
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vgreduce --removemissing $vg
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aux enable_dev "$dev2"
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vgextend $vg "$dev2"
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aux disable_dev "$dev3"
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lvconvert -y --repair $vg/mirror
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vgreduce --removemissing $vg
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aux enable_dev "$dev3"
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vgextend $vg "$dev3"
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lvremove -ff $vg
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# RAID5 single replace
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lvcreate --type raid5 -i 2 -l 2 -n $lv1 $vg "$dev1" "$dev2" "$dev3"
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aux wait_for_sync $vg $lv1
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aux disable_dev "$dev3"
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lvconvert -y --repair $vg/$lv1
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vgreduce --removemissing $vg
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aux enable_dev "$dev3"
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vgextend $vg "$dev3"
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lvremove -ff $vg
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# RAID6 double replace
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lvcreate --type raid5 -i 3 -l 2 -n $lv1 $vg \
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"$dev1" "$dev2" "$dev3" "$dev4" "$dev5"
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aux wait_for_sync $vg $lv1
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aux disable_dev "$dev4" "$dev5"
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lvconvert -y --repair $vg/$lv1
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vgreduce --removemissing $vg
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aux enable_dev "$dev4"
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aux enable_dev "$dev5"
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vgextend $vg "$dev4" "$dev5"
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lvremove -ff $vg
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vgremove -ff $vg
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