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lvm2/test/shell/pvcreate-operation-md.sh
Zdenek Kabelac de0ce46361 tests: fix md raid test on real /dev
Zero raid signatures when raid is stopped - so signatures
are not requiring wipe when pvcreate follows.

Handle real /dev
2015-04-23 20:28:44 +02:00

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#!/bin/sh
# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
. lib/inittest
# skip this test if mdadm or sfdisk (or others) aren't available
which mdadm || skip
which sfdisk || skip
which perl || skip
which awk || skip
which cut || skip
test -f /proc/mdstat && grep -q raid0 /proc/mdstat || \
modprobe raid0 || skip
aux lvmconf 'devices/md_component_detection = 1'
aux extend_filter_LVMTEST
aux extend_filter "a|/dev/md.*|"
aux prepare_devs 2
# Have MD use a non-standard name to avoid colliding with an existing MD device
# - mdadm >= 3.0 requires that non-standard device names be in /dev/md/
# - newer mdadm _completely_ defers to udev to create the associated device node
mdadm_maj=$(mdadm --version 2>&1 | perl -pi -e 's|.* v(\d+).*|\1|')
[ $mdadm_maj -ge 3 ] && \
mddev=/dev/md/md_lvm_test0 || \
mddev=/dev/md_lvm_test0
cleanup_md() {
# sleeps offer hack to defeat: 'md: md127 still in use'
# see: https://bugzilla.redhat.com/show_bug.cgi?id=509908#c25
aux udev_wait
mdadm --stop "$mddev" || true
mdadm --zero-superblock "$dev1" "$dev2" || true
aux udev_wait
if [ -b "$mddev" ]; then
# mdadm doesn't always cleanup the device node
sleep 2
rm -f "$mddev"
fi
}
cleanup_md_and_teardown() {
cleanup_md
aux teardown
}
# create 2 disk MD raid0 array (stripe_width=128K)
test -b "$mddev" && skip
trap 'cleanup_md_and_teardown' EXIT # cleanup this MD device at the end of the test
mdadm --create --metadata=1.0 "$mddev" --auto=md --level 0 --raid-devices=2 --chunk 64 "$dev1" "$dev2"
test -b "$mddev" || skip
test "$DM_DEV_DIR" != "/dev" && cp -LR "$mddev" "$DM_DEV_DIR" # so that LVM/DM can see the device
lvmdev="$DM_DEV_DIR/md_lvm_test0"
# Test alignment of PV on MD without any MD-aware or topology-aware detection
# - should treat $mddev just like any other block device
pv_align="1.00m"
pvcreate --metadatasize 128k \
--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
"$lvmdev"
check pv_field "$lvmdev" pe_start $pv_align
# Test md_chunk_alignment independent of topology-aware detection
pv_align="1.00m"
pvcreate --metadatasize 128k \
--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
"$lvmdev"
check pv_field "$lvmdev" pe_start $pv_align
# Test newer topology-aware alignment detection
# - first added to 2.6.31 but not "reliable" until 2.6.33
if kernel_at_least 2 6 33 ; then
pv_align="1.00m"
# optimal_io_size=131072, minimum_io_size=65536
pvcreate --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$lvmdev"
check pv_field "$lvmdev" pe_start $pv_align
fi
# partition MD array directly, depends on blkext in Linux >= 2.6.28
if kernel_at_least 2 6 28 ; then
# create one partition
sfdisk "$mddev" <<EOF
,,83
EOF
pvscan
# make sure partition on MD is _not_ removed
# - tests partition -> parent lookup via sysfs paths
not pvcreate --metadatasize 128k "$lvmdev"
# verify alignment_offset is accounted for in pe_start
# - topology infrastructure is available in Linux >= 2.6.31
# - also tests partition -> parent lookup via sysfs paths
# Oh joy: need to lookup /sys/block/md127 rather than /sys/block/md_lvm_test0
mddev_maj_min=$(ls -lL "$mddev" | awk '{ print $5 $6 }' | perl -pi -e 's|,|:|')
mddev_p_sysfs_name=$(echo /sys/dev/block/${mddev_maj_min}/*p1)
base_mddev_p=`basename $mddev_p_sysfs_name`
mddev_p=/dev/${base_mddev_p}
# in case the system is running without devtmpfs /dev
# wait here for created device node on tmpfs
aux udev_wait "$mddev_p"
test -b "$mddev_p" || skip
test "$DM_DEV_DIR" != "/dev" && cp -LR "$mddev_p" "$DM_DEV_DIR"
lvmdev_p="$DM_DEV_DIR/$base_mddev_p"
# Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
# but reliable alignment_offset support requires kernel.org Linux >= 2.6.33
sysfs_alignment_offset=/sys/dev/block/${mddev_maj_min}/${base_mddev_p}/alignment_offset
[ -f $sysfs_alignment_offset ] && kernel_at_least 2 6 33 && \
alignment_offset=`cat $sysfs_alignment_offset` || \
alignment_offset=0
if [ $alignment_offset -gt 0 ]; then
# default alignment is 1M, add alignment_offset
pv_align=$((1048576+$alignment_offset))B
pvcreate --metadatasize 128k "$lvmdev_p"
check pv_field "$lvmdev_p" pe_start $pv_align --units b
pvremove "$lvmdev_p"
fi
fi
# Test newer topology-aware alignment detection w/ --dataalignment override
if kernel_at_least 2 6 33 ; then
# make sure we're clean for another test
test -b "$mddev" && cleanup_md
dd if=/dev/zero of="$dev1" bs=512 count=1
dd if=/dev/zero of="$dev2" bs=512 count=1
pvcreate -f "$dev1"
pvcreate -f "$dev2"
# create 2 disk MD raid0 array (stripe_width=2M)
test -b "$mddev" && skip
mdadm --create --metadata=1.0 "$mddev" --auto=md --level 0 --raid-devices=2 --chunk 1024 "$dev1" "$dev2"
test -b "$mddev" || skip
# optimal_io_size=2097152, minimum_io_size=1048576
pv_align="2.00m"
pvcreate --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$lvmdev"
pvscan # Something is seriously broken.
check pv_field "$lvmdev" pe_start $pv_align
# now verify pe_start alignment override using --dataalignment
pv_align="192.00k"
pvcreate --dataalignment 64k --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$lvmdev"
check pv_field "$lvmdev" pe_start $pv_align
fi