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# 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
# skip this test if mdadm or sfdisk (or others) aren't available
which mdadm || exit 200
which sfdisk || exit 200
which perl || exit 200
which awk || exit 200
which cut || exit 200
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test -f /proc/mdstat && grep -q raid0 /proc/mdstat || \
modprobe raid0 || exit 200
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. ./test-utils.sh
prepare_lvmconf '[ "a|/dev/md.*|", "a/dev\/mapper\/.*$/", "r/.*/" ]'
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
sleep 2
mdadm --stop $mddev
if [ -b " $mddev " ] ; then
# mdadm doesn't always cleanup the device node
sleep 2
rm -f $mddev
fi
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teardown
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}
# create 2 disk MD raid0 array (stripe_width=128K)
[ -b " $mddev " ] && exit 200
mdadm --create $mddev --auto= md --level 0 --raid-devices= 2 --chunk 64 $dev1 $dev2
trap 'aux cleanup_md' EXIT # cleanup this MD device at the end of the test
# Test alignment of PV on MD without any MD-aware or topology-aware detection
# - should treat $mddev just like any other block device
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pv_align = "192.00k"
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pvcreate --metadatasize 128k \
--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
$mddev
check_pv_field_ $mddev pe_start $pv_align
# Test md_chunk_alignment independent of topology-aware detection
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pv_align = "256.00k"
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pvcreate --metadatasize 128k \
--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
$mddev
check_pv_field_ $mddev pe_start $pv_align
# Get linux minor version
linux_minor = $( echo ` uname -r` | cut -d'.' -f3 | cut -d'-' -f1)
# Test newer topology-aware alignment detection
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# - first added to 2.6.31 but not "reliable" until 2.6.33
if [ $linux_minor -ge 33 ] ; then
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pv_align = "256.00k"
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pvcreate --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' $mddev
check_pv_field_ $mddev pe_start $pv_align
fi
# partition MD array directly, depends on blkext in Linux >= 2.6.28
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if [ $linux_minor -ge 28 ] ; then
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# create one partition
sfdisk $mddev <<EOF
,,83
EOF
# make sure partition on MD is _not_ removed
# - tests partition -> parent lookup via sysfs paths
not pvcreate --metadatasize 128k $mddev
# 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 }
# Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
sysfs_alignment_offset = /sys/dev/block/${ mddev_maj_min } /${ base_mddev_p } /alignment_offset
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[ -f $sysfs_alignment_offset -a $linux_minor -ge 33 ] && \
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alignment_offset = ` cat $sysfs_alignment_offset ` || \
alignment_offset = 0
if [ " $alignment_offset " = "512" ] ; then
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pv_align = "256.50k"
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pvcreate --metadatasize 128k $mddev_p
check_pv_field_ $mddev_p pe_start $pv_align
pvremove $mddev_p
elif [ " $alignment_offset " = "2048" ] ; then
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pv_align = "258.00k"
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pvcreate --metadatasize 128k $mddev_p
check_pv_field_ $mddev_p pe_start $pv_align
pvremove $mddev_p
fi
fi