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9c179ef418
detected alignment. NOTE: lvm2 doesn't detect MD 1.2 metadata (now the default on RHEL6) so for now I'm forcing 1.0 metadata. This was needed to be able to reuse the existing loop devices but recreate the md device with different raid0 striping.
144 lines
5.1 KiB
Bash
144 lines
5.1 KiB
Bash
# Copyright (C) 2009 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., 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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which awk || exit 200
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which cut || 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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. ./test-utils.sh
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prepare_lvmconf '[ "a|/dev/md.*|", "a/dev\/mapper\/.*$/", "r/.*/" ]'
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aux prepare_devs 2
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# Have MD use a non-standard name to avoid colliding with an existing MD device
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# - mdadm >= 3.0 requires that non-standard device names be in /dev/md/
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# - newer mdadm _completely_ defers to udev to create the associated device node
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mdadm_maj=$(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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cleanup_md() {
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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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sleep 2
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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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sleep 2
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rm -f $mddev
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fi
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}
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cleanup_md_and_teardown() {
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cleanup_md
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teardown
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}
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# create 2 disk MD raid0 array (stripe_width=128K)
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test -b "$mddev" && exit 200
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mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
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trap 'aux cleanup_md_and_teardown' EXIT # cleanup this MD device at the end of the test
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test -b "$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 $mddev just like any other block device
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pv_align="1.00m"
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pvcreate --metadatasize 128k \
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--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
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$mddev
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check_pv_field_ $mddev pe_start $pv_align
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# Test md_chunk_alignment independent of topology-aware detection
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pv_align="1.00m"
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pvcreate --metadatasize 128k \
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--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
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$mddev
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check_pv_field_ $mddev pe_start $pv_align
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# Get linux minor version
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linux_minor=$(echo `uname -r` | cut -d'.' -f3 | cut -d'-' -f1)
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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 [ $linux_minor -ge 33 ]; then
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pv_align="1.00m"
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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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fi
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# 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
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sfdisk $mddev <<EOF
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,,83
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EOF
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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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# 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 -a $linux_minor -ge 33 ] && \
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alignment_offset=`cat $sysfs_alignment_offset` || \
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alignment_offset=0
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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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pvremove $mddev_p
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fi
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fi
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# Test newer topology-aware alignment detection w/ --dataalignment override
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if [ $linux_minor -ge 33 ]; then
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cleanup_md
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pvcreate -f $dev1
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pvcreate -f $dev2
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# create 2 disk MD raid0 array (stripe_width=2M)
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test -b "$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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pv_align="2.00m"
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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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pv_align="192.00k"
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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
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fi
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