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      1 # Copyright (C) 2009 Red Hat, Inc. All rights reserved.
      2 #
      3 # This copyrighted material is made available to anyone wishing to use,
      4 # modify, copy, or redistribute it subject to the terms and conditions
      5 # of the GNU General Public License v.2.
      6 #
      7 # You should have received a copy of the GNU General Public License
      8 # along with this program; if not, write to the Free Software Foundation,
      9 # Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     10 
     11 # skip this test if mdadm or sfdisk (or others) aren't available
     12 which mdadm || exit 200
     13 which sfdisk || exit 200
     14 which perl || exit 200
     15 which awk || exit 200
     16 which cut || exit 200
     17 test -f /proc/mdstat || exit 200
     18 
     19 . ./test-utils.sh
     20 
     21 prepare_lvmconf '[ "a|/dev/md.*|", "a/dev\/mapper\/.*$/", "r/.*/" ]'
     22 aux prepare_devs 2
     23 
     24 # Have MD use a non-standard name to avoid colliding with an existing MD device
     25 # - mdadm >= 3.0 requires that non-standard device names be in /dev/md/
     26 # - newer mdadm _completely_ defers to udev to create the associated device node
     27 mdadm_maj=$(mdadm --version 2>&1 | perl -pi -e 's|.* v(\d+).*|\1|')
     28 [ $mdadm_maj -ge 3 ] && \
     29     mddev=/dev/md/md_lvm_test0 || \
     30     mddev=/dev/md_lvm_test0
     31 
     32 cleanup_md() {
     33     # sleeps offer hack to defeat: 'md: md127 still in use'
     34     # see: https://bugzilla.redhat.com/show_bug.cgi?id=509908#c25
     35     sleep 2
     36     mdadm --stop $mddev
     37     if [ -b "$mddev" ]; then
     38         # mdadm doesn't always cleanup the device node
     39 	sleep 2
     40 	rm -f $mddev
     41     fi
     42     teardown_
     43 }
     44 
     45 # create 2 disk MD raid0 array (stripe_width=128K)
     46 [ -b "$mddev" ] && exit 200
     47 mdadm --create $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
     48 trap 'aux cleanup_md' EXIT # cleanup this MD device at the end of the test
     49 
     50 # Test alignment of PV on MD without any MD-aware or topology-aware detection
     51 # - should treat $mddev just like any other block device
     52 pv_align="192.00k"
     53 pvcreate --metadatasize 128k \
     54     --config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
     55     $mddev
     56 check_pv_field_ $mddev pe_start $pv_align
     57 
     58 # Test md_chunk_alignment independent of topology-aware detection
     59 pv_align="256.00k"
     60 pvcreate --metadatasize 128k \
     61     --config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
     62     $mddev
     63 check_pv_field_ $mddev pe_start $pv_align
     64 
     65 # Get linux minor version
     66 linux_minor=$(echo `uname -r` | cut -d'.' -f3 | cut -d'-' -f1)
     67 
     68 # Test newer topology-aware alignment detection
     69 if [ $linux_minor -gt 31 ]; then
     70     pv_align="256.00k"
     71     pvcreate --metadatasize 128k \
     72 	--config 'devices { md_chunk_alignment=0 }' $mddev
     73     check_pv_field_ $mddev pe_start $pv_align
     74 fi
     75 
     76 # partition MD array directly, depends on blkext in Linux >= 2.6.28
     77 if [ $linux_minor -gt 27 ]; then
     78     # create one partition
     79     sfdisk $mddev <<EOF
     80 ,,83
     81 EOF
     82     # make sure partition on MD is _not_ removed
     83     # - tests partition -> parent lookup via sysfs paths
     84     not pvcreate --metadatasize 128k $mddev
     85 
     86     # verify alignment_offset is accounted for in pe_start
     87     # - topology infrastructure is available in Linux >= 2.6.31
     88     # - also tests partition -> parent lookup via sysfs paths
     89 
     90     # Oh joy: need to lookup /sys/block/md127 rather than /sys/block/md_lvm_test0
     91     mddev_maj_min=$(ls -lL $mddev | awk '{ print $5 $6 }' | perl -pi -e 's|,|:|')
     92     mddev_p_sysfs_name=$(echo /sys/dev/block/${mddev_maj_min}/*p1)
     93     base_mddev_p=`basename $mddev_p_sysfs_name`
     94     mddev_p=/dev/${base_mddev_p}
     95 
     96     # Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
     97     sysfs_alignment_offset=/sys/dev/block/${mddev_maj_min}/${base_mddev_p}/alignment_offset
     98     [ -f $sysfs_alignment_offset ] && \
     99 	alignment_offset=`cat $sysfs_alignment_offset` || \
    100 	alignment_offset=0
    101 
    102     if [ "$alignment_offset" = "512" ]; then
    103 	pv_align="256.50k"
    104 	pvcreate --metadatasize 128k $mddev_p
    105 	check_pv_field_ $mddev_p pe_start $pv_align
    106 	pvremove $mddev_p
    107     elif [ "$alignment_offset" = "2048" ]; then
    108 	pv_align="258.00k"
    109 	pvcreate --metadatasize 128k $mddev_p
    110 	check_pv_field_ $mddev_p pe_start $pv_align
    111 	pvremove $mddev_p
    112     fi
    113 fi
    114