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fd6ca7415f
isn't already available (in /proc/mdstat).
switch to requiring 2.6.33 for the alignment_offset tests; 2.6.{31,32}
alignment_offset values aren't reliable. 2.6.33 _should_ have mkp's
alignment_offset fixes but so far it doesn't (as of 2.6.33-rc4).
117 lines
4.1 KiB
Bash
117 lines
4.1 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 $mddev
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if [ -b "$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 $mddev
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fi
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teardown_
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}
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# create 2 disk MD raid0 array (stripe_width=128K)
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[ -b "$mddev" ] && exit 200
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mdadm --create $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
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trap 'aux cleanup_md' EXIT # cleanup this MD device at the end of the test
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# Test alignment of PV on MD without any MD-aware or topology-aware detection
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# - should treat $mddev just like any other block device
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pv_align="192.00k"
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pvcreate --metadatasize 128k \
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--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
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$mddev
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check_pv_field_ $mddev pe_start $pv_align
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# Test md_chunk_alignment independent of topology-aware detection
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pv_align="256.00k"
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pvcreate --metadatasize 128k \
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--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
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$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="256.00k"
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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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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" = "512" ]; then
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pv_align="256.50k"
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pvcreate --metadatasize 128k $mddev_p
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check_pv_field_ $mddev_p pe_start $pv_align
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pvremove $mddev_p
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elif [ "$alignment_offset" = "2048" ]; then
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pv_align="258.00k"
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pvcreate --metadatasize 128k $mddev_p
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check_pv_field_ $mddev_p pe_start $pv_align
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pvremove $mddev_p
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fi
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fi
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