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db98a6e362
If udev info is missing for a device, (which would indicate if it's an MD component), then do an end-of-device read to check if a PV is an MD component. (This is skipped when using hints since we already know devs in hints are good.) A new config setting md_component_checks can be used to disable the additional end-of-device MD checks, or to always enable end-of-device MD checks. When both hints and udev info are disabled/unavailable, the end of PVs will now be scanned by default. If md devices with end-of-device superblocks are not being used, the extra I/O overhead can be avoided by setting md_component_checks="start".
241 lines
5.1 KiB
Bash
241 lines
5.1 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2018 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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RUNDIR="/run"
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test -d "$RUNDIR" || RUNDIR="/var/run"
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PVS_ONLINE_DIR="$RUNDIR/lvm/pvs_online"
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VGS_ONLINE_DIR="$RUNDIR/lvm/vgs_online"
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_clear_online_files() {
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# wait till udev is finished
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aux udev_wait
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rm -f "$PVS_ONLINE_DIR"/*
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rm -f "$VGS_ONLINE_DIR"/*
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}
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. lib/inittest
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test -f /proc/mdstat && grep -q raid1 /proc/mdstat || \
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modprobe raid1 || skip
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aux lvmconf 'devices/md_component_detection = 1'
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# This stops lvm from taking advantage of hints which
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# will have already excluded md components.
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aux lvmconf 'devices/hints = "none"'
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# This stops lvm from asking udev if a dev is an md component.
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# LVM will ask udev if a dev is an md component, but we don't
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# want to rely on that ability in this test.
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aux lvmconf 'devices/obtain_device_list_from_udev = 0'
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aux extend_filter_LVMTEST "a|/dev/md|"
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aux prepare_devs 2
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# create 2 disk MD raid1 array
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# by default using metadata format 1.0 with data at the end of device
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aux prepare_md_dev 1 64 2 "$dev1" "$dev2"
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cat /proc/mdstat
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mddev=$(< MD_DEV)
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pvdev=$(< MD_DEV_PV)
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vgcreate $vg "$mddev"
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lvcreate -n $lv1 -l 2 $vg
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lvcreate -n $lv2 -l 2 -an $vg
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lvchange -ay $vg/$lv2
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check lv_field $vg/$lv1 lv_active "active"
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# lvm does not show md components as PVs
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pvs "$mddev"
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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sleep 1
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vgchange -an $vg
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sleep 1
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# When the md device is started, lvm will see that and know to
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# scan for md components, so stop the md device to remove this
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# advantage so we will test the fallback detection.
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mdadm --stop "$mddev"
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aux udev_wait
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# The md components should still be detected and excluded.
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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pvs -vvvv
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# should not activate from the md legs
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not vgchange -ay $vg
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# should not show an active lv
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rm out
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lvs -o active $vg |tee out || true
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not grep "active" out
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# should not allow updating vg
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not lvcreate -l1 $vg
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# should not activate from the md legs
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_clear_online_files
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pvscan --cache -aay "$dev1"
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pvscan --cache -aay "$dev2"
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# should not show an active lv
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rm out
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lvs -o active $vg |tee out || true
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not grep "active" out
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# start the md dev
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mdadm --assemble "$mddev" "$dev1" "$dev2"
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aux udev_wait
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# Now that the md dev is online, pvs can see it
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# and check for components even if
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# md_component_checks is "start" (which disables
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# most default end-of-device scans)
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aux lvmconf 'devices/md_component_checks = "start"'
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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vgchange -ay $vg
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check lv_field $vg/$lv1 lv_active "active"
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vgchange -an $vg
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aux udev_wait
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vgremove -f $vg
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aux cleanup_md_dev
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# Put this setting back to the default
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aux lvmconf 'devices/md_component_checks = "auto"'
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# create 2 disk MD raid0 array
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# by default using metadata format 1.0 with data at the end of device
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# When a raid0 md array is stopped, the components will not look like
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# duplicate PVs as they do with raid1.
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aux prepare_md_dev 0 64 2 "$dev1" "$dev2"
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cat /proc/mdstat
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mddev=$(< MD_DEV)
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pvdev=$(< MD_DEV_PV)
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vgcreate $vg "$mddev"
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lvs $vg
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lvcreate -n $lv1 -l 2 $vg
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lvcreate -n $lv2 -l 2 -an $vg
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lvchange -ay $vg/$lv2
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check lv_field $vg/$lv1 lv_active "active"
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# lvm does not show md components as PVs
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pvs "$mddev"
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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sleep 1
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vgchange -an $vg
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sleep 1
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# When the md device is started, lvm will see that and know to
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# scan for md components, so stop the md device to remove this
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# advantage so we will test the fallback detection.
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mdadm --stop "$mddev"
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aux udev_wait
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# The md components should still be detected and excluded.
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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pvs -vvvv
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# should not activate from the md legs
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not vgchange -ay $vg
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# should not show an active lv
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rm out
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lvs -o active $vg |tee out || true
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not grep "active" out
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# should not allow updating vg
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not lvcreate -l1 $vg
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# should not activate from the md legs
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_clear_online_files
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pvscan --cache -aay "$dev1"
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pvscan --cache -aay "$dev2"
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# should not show an active lv
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rm out
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lvs -o active $vg |tee out || true
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not grep "active" out
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# start the md dev
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mdadm --assemble "$mddev" "$dev1" "$dev2"
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aux udev_wait
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# Now that the md dev is online, pvs can see it
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# and check for components even if
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# md_component_checks is "start" (which disables
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# most default end-of-device scans)
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aux lvmconf 'devices/md_component_checks = "start"'
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not pvs "$dev1"
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not pvs "$dev2"
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pvs > out
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not grep "$dev1" out
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not grep "$dev2" out
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vgchange -ay $vg 2>&1 |tee out
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check lv_field $vg/$lv1 lv_active "active"
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vgchange -an $vg
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aux udev_wait
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vgremove -f $vg
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aux cleanup_md_dev
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