1 # Copyright (C) 2009 Red Hat, Inc. All rights reserved.
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.
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
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
18 test -f /proc/mdstat && grep -q raid0 /proc/mdstat || \
19 modprobe raid0 || exit 200
23 prepare_lvmconf '[ "a|/dev/md.*|", "a/dev\/mapper\/.*$/", "r/.*/" ]'
26 # Have MD use a non-standard name to avoid colliding with an existing MD device
27 # - mdadm >= 3.0 requires that non-standard device names be in /dev/md/
28 # - newer mdadm _completely_ defers to udev to create the associated device node
29 mdadm_maj=$(mdadm --version 2>&1 | perl -pi -e 's|.* v(\d+).*|\1|')
30 [ $mdadm_maj -ge 3 ] && \
31 mddev=/dev/md/md_lvm_test0 || \
32 mddev=/dev/md_lvm_test0
35 # sleeps offer hack to defeat: 'md: md127 still in use'
36 # see: https://bugzilla.redhat.com/show_bug.cgi?id=509908#c25
38 mdadm --stop $mddev || true
39 if [ -b "$mddev" ]; then
40 # mdadm doesn't always cleanup the device node
46 cleanup_md_and_teardown() {
51 # create 2 disk MD raid0 array (stripe_width=128K)
52 test -b "$mddev" && exit 200
53 mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
54 trap 'aux cleanup_md_and_teardown' EXIT # cleanup this MD device at the end of the test
55 test -b "$mddev" || exit 200
57 # Test alignment of PV on MD without any MD-aware or topology-aware detection
58 # - should treat $mddev just like any other block device
60 pvcreate --metadatasize 128k \
61 --config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
63 check_pv_field_ $mddev pe_start $pv_align
65 # Test md_chunk_alignment independent of topology-aware detection
67 pvcreate --metadatasize 128k \
68 --config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
70 check_pv_field_ $mddev pe_start $pv_align
72 # Get linux minor version
73 linux_minor=$(echo `uname -r` | cut -d'.' -f3 | cut -d'-' -f1)
75 # Test newer topology-aware alignment detection
76 # - first added to 2.6.31 but not "reliable" until 2.6.33
77 if [ $linux_minor -ge 33 ]; then
79 # optimal_io_size=131072, minimum_io_size=65536
80 pvcreate --metadatasize 128k \
81 --config 'devices { md_chunk_alignment=0 }' $mddev
82 check_pv_field_ $mddev pe_start $pv_align
85 # partition MD array directly, depends on blkext in Linux >= 2.6.28
86 if [ $linux_minor -ge 28 ]; then
87 # create one partition
91 # make sure partition on MD is _not_ removed
92 # - tests partition -> parent lookup via sysfs paths
93 not pvcreate --metadatasize 128k $mddev
95 # verify alignment_offset is accounted for in pe_start
96 # - topology infrastructure is available in Linux >= 2.6.31
97 # - also tests partition -> parent lookup via sysfs paths
99 # Oh joy: need to lookup /sys/block/md127 rather than /sys/block/md_lvm_test0
100 mddev_maj_min=$(ls -lL $mddev | awk '{ print $5 $6 }' | perl -pi -e 's|,|:|')
101 mddev_p_sysfs_name=$(echo /sys/dev/block/${mddev_maj_min}/*p1)
102 base_mddev_p=`basename $mddev_p_sysfs_name`
103 mddev_p=/dev/${base_mddev_p}
105 # Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
106 # but reliable alignment_offset support requires kernel.org Linux >= 2.6.33
107 sysfs_alignment_offset=/sys/dev/block/${mddev_maj_min}/${base_mddev_p}/alignment_offset
108 [ -f $sysfs_alignment_offset -a $linux_minor -ge 33 ] && \
109 alignment_offset=`cat $sysfs_alignment_offset` || \
112 if [ $alignment_offset -gt 0 ]; then
113 # default alignment is 1M, add alignment_offset
114 pv_align=$((1048576+$alignment_offset))B
115 pvcreate --metadatasize 128k $mddev_p
116 check_pv_field_ $mddev_p pe_start $pv_align "--units b"
121 # Test newer topology-aware alignment detection w/ --dataalignment override
122 if [ $linux_minor -ge 33 ]; then
127 # create 2 disk MD raid0 array (stripe_width=2M)
128 test -b "$mddev" && exit 200
129 mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 1024 $dev1 $dev2
130 test -b "$mddev" || exit 200
132 # optimal_io_size=2097152, minimum_io_size=1048576
134 pvcreate --metadatasize 128k \
135 --config 'devices { md_chunk_alignment=0 }' $mddev
136 check_pv_field_ $mddev pe_start $pv_align
138 # now verify pe_start alignment override using --dataalignment
140 pvcreate --dataalignment 64k --metadatasize 128k \
141 --config 'devices { md_chunk_alignment=0 }' $mddev
142 check_pv_field_ $mddev pe_start $pv_align