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54 lines
2.1 KiB
Bash
54 lines
2.1 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2021 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, MA 02110-1301 USA
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SKIP_WITH_LVMPOLLD=1
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. lib/inittest
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aux have_cache 1 10 0 || skip
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aux prepare_vg 3
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#
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# This lvconvert command will deactivate LV1, then internally create a new
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# lv, lvol0, as a poolmetadataspare, then activate lvol0 to zero it.
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# lvol0 will get the same major:minor that LV1 had. When the code gets
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# the struct dev for lvol0, the new path to lvol0 is added to the
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# dev-cache with it's major:minor. That major:minor already exists in
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# dev-cache and has the stale LV1 as an alias. So the path to lvol0 is
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# added as an alias to the existing struct dev (with the correct
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# major:minor), but that struct dev has the stale LV1 path on its aliases
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# list. The code will now validate all the aliases before returning the
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# dev for lvol0, and will find that the LV1 path is stale and remove it
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# from the aliases. That will prevent the stale path from being used for
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# the dev in place of the new path.
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#
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# The preferred_name is set to /dev/mapper so that if the stale path still
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# exists, that stale path would be used as the name for the dev, and the
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# wiping code would fail to open that stale name.
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#
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lvcreate -n $lv1 -L32M $vg "$dev1"
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lvcreate -n $lv2 -L16M $vg "$dev2"
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lvconvert -y --type cache-pool --poolmetadata $lv2 --cachemode writeback $vg/$lv1 --config='devices { preferred_names=["/dev/mapper/"] }'
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lvremove -y $vg/$lv1
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lvcreate -n $lv1 -L32M $vg "$dev1"
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lvcreate -n $lv2 -L16M $vg "$dev2"
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lvconvert -y --type cache-pool --poolmetadata $lv2 $vg/$lv1
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lvremove -y $vg/$lv1
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# TODO: add more validation of dev aliases being specified as command
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# args in combination with various preferred_names settings.
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vgremove -ff $vg
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