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# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
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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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# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# skip this test if mdadm or sfdisk (or others) aren't available
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which mdadm || exit 200
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which sfdisk || exit 200
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which perl || exit 200
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test -f /proc/mdstat && grep -q raid0 /proc/mdstat || \
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modprobe raid0 || exit 200
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aux lvmconf 'devices/filter = [ "a|/dev/md.*|", "a/dev\/mapper\/.*$/", "r/.*/" ]'
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# Have MD use a non-standard name to avoid colliding with an existing MD device
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# - mdadm >= 3.0 requires that non-standard device names be in /dev/md/
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# - newer mdadm _completely_ defers to udev to create the associated device node
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mdadm_maj=$(mdadm --version 2>&1 | perl -pi -e 's|.* v(\d+).*|\1|')
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[ $mdadm_maj -ge 3 ] && \
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mddev=/dev/md/md_lvm_test0 || \
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mddev=/dev/md_lvm_test0
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# sleeps offer hack to defeat: 'md: md127 still in use'
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# see: https://bugzilla.redhat.com/show_bug.cgi?id=509908#c25
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mdadm --stop $mddev || true
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if [ -b "$mddev" ]; then
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# mdadm doesn't always cleanup the device node
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cleanup_md_and_teardown() {
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# create 2 disk MD raid0 array (stripe_width=128K)
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test -b "$mddev" && exit 200
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mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
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trap 'cleanup_md_and_teardown' EXIT # cleanup this MD device at the end of the test
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test -b "$mddev" || exit 200
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# Test alignment of PV on MD without any MD-aware or topology-aware detection
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# - should treat $mddev just like any other block device
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pvcreate --metadatasize 128k \
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--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
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check pv_field $mddev pe_start $pv_align
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# Test md_chunk_alignment independent of topology-aware detection
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pvcreate --metadatasize 128k \
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--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
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check pv_field $mddev pe_start $pv_align
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# Test newer topology-aware alignment detection
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# - first added to 2.6.31 but not "reliable" until 2.6.33
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if kernel_at_least 2 6 33 ; then
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# optimal_io_size=131072, minimum_io_size=65536
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pvcreate --metadatasize 128k \
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--config 'devices { md_chunk_alignment=0 }' $mddev
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check pv_field $mddev pe_start $pv_align
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# partition MD array directly, depends on blkext in Linux >= 2.6.28
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if kernel_at_least 2 6 28 ; then
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# create one partition
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# make sure partition on MD is _not_ removed
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# - tests partition -> parent lookup via sysfs paths
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not pvcreate --metadatasize 128k $mddev
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# verify alignment_offset is accounted for in pe_start
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# - topology infrastructure is available in Linux >= 2.6.31
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# - also tests partition -> parent lookup via sysfs paths
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# Oh joy: need to lookup /sys/block/md127 rather than /sys/block/md_lvm_test0
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mddev_maj_min=$(ls -lL $mddev | awk '{ print $5 $6 }' | perl -pi -e 's|,|:|')
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mddev_p_sysfs_name=$(echo /sys/dev/block/${mddev_maj_min}/*p1)
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base_mddev_p=`basename $mddev_p_sysfs_name`
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mddev_p=/dev/${base_mddev_p}
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# in case the system is running without devtmpfs /dev
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# wait here for created device node on tmpfs
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aux udev_wait $mddev_p
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test -b $mddev_p || exit 200
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# Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
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# but reliable alignment_offset support requires kernel.org Linux >= 2.6.33
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sysfs_alignment_offset=/sys/dev/block/${mddev_maj_min}/${base_mddev_p}/alignment_offset
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[ -f $sysfs_alignment_offset ] && kernel_at_least 2 6 33 && \
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alignment_offset=`cat $sysfs_alignment_offset` || \
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if [ $alignment_offset -gt 0 ]; then
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# default alignment is 1M, add alignment_offset
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pv_align=$((1048576+$alignment_offset))B
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pvcreate --metadatasize 128k $mddev_p
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check pv_field $mddev_p pe_start $pv_align "--units b"
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# Test newer topology-aware alignment detection w/ --dataalignment override
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if kernel_at_least 2 6 33 ; then
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# create 2 disk MD raid0 array (stripe_width=2M)
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test -b "$mddev" && exit 200
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mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 1024 $dev1 $dev2
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test -b "$mddev" || exit 200
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# optimal_io_size=2097152, minimum_io_size=1048576
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pvcreate --metadatasize 128k \
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--config 'devices { md_chunk_alignment=0 }' $mddev
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check pv_field $mddev pe_start $pv_align
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# now verify pe_start alignment override using --dataalignment
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pvcreate --dataalignment 64k --metadatasize 128k \
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--config 'devices { md_chunk_alignment=0 }' $mddev
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check pv_field $mddev pe_start $pv_align
added
removed
test/t-pvcreate-operation-md.sh
