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138 lines
4.2 KiB
Bash
138 lines
4.2 KiB
Bash
#!/bin/sh
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# Copyright (C) 2008-2013 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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test_description='Test duplicate PVs'
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SKIP_WITH_LVMLOCKD=1
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. lib/inittest
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aux prepare_devs 2
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pvcreate "$dev1"
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vgcreate $vg1 "$dev1"
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# Clone the PV
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dd if="$dev1" of="$dev2" bs=256K count=1 iflag=direct oflag=direct
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aux notify_lvmetad "$dev2"
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# When there are cloned devices (same pvid), one will be referenced in
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# lvmcache as pv->dev, and the other will not be referenced from lvmcache,
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# it'll only be in device cache. The one referenced by lvmcache is
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# referred to as the "preferred" one, and is the one that is printed by a
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# standard 'pvs' command.
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#
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# We don't know if dev1 or dev2 will be preferred, so we first check that
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# and save it as PV1, the other as PV2.
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#
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# The rules that 'pvs' follows to choose which PVs to display are
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# somewhat strange and seem arbitrary from a user perspective;
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# the choice is driven largely by what's most practical in the code,
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# but also by what vgimportclone needs.
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#
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# Some of the rules that process_each_pv is using:
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# - When no pv arg is specified, print the one preferred dev.
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# - When pv args are specified, print one line per specified arg,
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# i.e. don't print all duplicate pvs when one is specified.
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# - Always print the preferred duplicate, even if it was not the
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# one specified, e.g. If there are two duplicates on A and B,
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# and A is the preferred device, then 'pvs A' will show A and
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# 'pvs B' will show A.
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# - If multiple duplicates are specified, then print each, e.g.
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# 'pvs A B' will show both A and B.
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# - If three duplicates exist on A, B, C, and the preferred is A,
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# and the command 'pvs B C' is run, then the A will be printed
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# first since we always print the preferred device, and then
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# either B or C will be printed. 'pvs A B C' will print all.
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# - 'pvs -a' should print all the duplicates and should show
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# the same VG for each.
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# - 'pvs -o+size ...' should show the correct size of the
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# devices being printed if they differ among the duplicates.
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# - By using 'pvs --config' with a filter, you can filter out
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# the duplicate devs you don't want so that pvs will
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# print the devs you do want to see.
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#
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# The tests below check these behaviors on up to two duplicates,
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# so if the process_each_pv logic changes regarding which
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# duplicates are chosen, then this test will need adjusting.
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# Verify that there is only one PV printed, i.e. the preferred
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pvs --noheading | tee out
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test $(wc -l < out) -eq 1
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# Set PV1 to the perferred/cached PV, and PV2 to the other.
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# Cannot use pvs -o pv_name because that command goes to
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# disk and does not represent what lvmetad thinks.
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PV1=$(pvs --noheading | awk '{ print $1 }')
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echo PV1 is $PV1
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if [ $PV1 == $dev1 ]; then
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PV2=$dev2
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else
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PV2=$dev1
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fi
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echo PV2 is $PV2
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# check listed pvs
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pvs --noheading | tee out
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grep $PV1 out
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not grep $PV2 out
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# check error messages
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pvs --noheading 2>&1 | tee out
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grep "Found duplicate" out >err
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grep "using $PV1 not $PV2" err
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# check listed pvs
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pvs --noheading "$dev1" | tee out
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grep $PV1 out
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not grep $PV2 out
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# check error messages
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pvs --noheading "$dev1" 2>&1 | tee out
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grep "Found duplicate" out >err
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grep "using $PV1 not $PV2" err
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# check listed pvs
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pvs --noheading "$dev2" | tee out
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grep $PV1 out
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not grep $PV2 out
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# check error messages
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pvs --noheading "$dev2" 2>&1 | tee out
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grep "Found duplicate" out >err
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grep "using $PV1 not $PV2" err
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# check listed pvs
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pvs --noheading "$dev1" "$dev2" | tee out
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grep $PV1 out
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grep $PV2 out
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# check error messages
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pvs --noheading "$dev1" "$dev2" 2>&1 | tee out
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grep "Found duplicate" out >err
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grep "using $PV1 not $PV2" err
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# check listed pvs
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pvs --noheading -a | tee out
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grep $PV1 out
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grep $PV2 out
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grep $PV1 out | grep $vg1
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grep $PV2 out | grep $vg1
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# check error messages
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pvs --noheading -a 2>&1 | tee out
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grep "Found duplicate" out >err
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grep "using $PV1 not $PV2" err
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# TODO: I'd like to test that a subsystem device is preferred
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# over a non-subsystem device, but all the devices used here
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# are DM devices, i.e. they are already subsystem devices,
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# so I can't just wrap a standard block device with a DM
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# identity mapping.
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