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#!/usr/bin/env bash
# Copyright (C) 2009-2015 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
SKIP_WITH_LVMPOLLD=1
. lib/inittest
# skip this test if mdadm or sfdisk (or others) aren't available
which sfdisk || skip
aux lvmconf 'devices/md_component_detection = 1'
aux extend_filter_md "a|/dev/md|"
aux prepare_devs 2
# create 2 disk MD raid0 array (stripe_width=128K)
aux mdadm_create --metadata=1.0 --level=0 --chunk=64 --raid-devices=2 "$dev1" "$dev2"
mddev=$(< MD_DEV)
pvdev="$mddev"
# Test alignment of PV on MD without any MD-aware or topology-aware detection
# - should treat $mddev just like any other block device
pvcreate --metadatasize 128k \
--config 'devices {md_chunk_alignment=0 data_alignment_detection=0 data_alignment_offset_detection=0}' \
"$pvdev"
check pv_field "$pvdev" pe_start "1.00m"
# Test md_chunk_alignment independent of topology-aware detection
pvcreate --metadatasize 128k \
--config 'devices {data_alignment_detection=0 data_alignment_offset_detection=0}' \
"$pvdev"
check pv_field "$pvdev" pe_start "1.00m"
# Test newer topology-aware alignment detection
# - first added to 2.6.31 but not "reliable" until 2.6.33
if aux kernel_at_least 2 6 33 ; then
# optimal_io_size=131072, minimum_io_size=65536
pvcreate --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$pvdev"
check pv_field "$pvdev" pe_start "1.00m"
pvremove "$pvdev"
fi
# partition MD array directly, depends on blkext in Linux >= 2.6.28
if aux kernel_at_least 2 6 28 ; then
# create one partition
sfdisk "$mddev" <<EOF
,,83
EOF
# Wait till all partition links in udev are created
aux udev_wait
# Skip test if udev rule has not created proper links for partitions
test -b "${mddev}p1" || { ls -laR /dev ; skip "Missing partition link" ; }
pvscan
# make sure partition on MD is _not_ removed
# - tests partition -> parent lookup via sysfs paths
not pvcreate --metadatasize 128k "$pvdev"
# verify alignment_offset is accounted for in pe_start
# - topology infrastructure is available in Linux >= 2.6.31
# - also tests partition -> parent lookup via sysfs paths
# Checking for 'alignment_offset' in sysfs implies Linux >= 2.6.31
# but reliable alignment_offset support requires kernel.org Linux >= 2.6.33
if aux kernel_at_least 2 6 33 ; then
# in case the system is running without devtmpfs /dev
# wait here for created device node on tmpfs
# test "$DM_DEV_DIR" = "/dev" || cp -LR "${mddev}p1" "${pvdev%/*}"
pvcreate --metadatasize 128k "${pvdev}p1"
maj=$(($(stat -L --printf=0x%t "${mddev}p1")))
min=$(($(stat -L --printf=0x%T "${mddev}p1")))
ls /sys/dev/block/$maj:$min/
ls /sys/dev/block/$maj:$min/holders/
cat /sys/dev/block/$maj:$min/dev
cat /sys/dev/block/$maj:$min/stat
cat /sys/dev/block/$maj:$min/size
sysfs_alignment_offset="/sys/dev/block/$maj:$min/alignment_offset"
[ -f "$sysfs_alignment_offset" ] && \
alignment_offset=$(< "$sysfs_alignment_offset") || \
alignment_offset=0
# default alignment is 1M, add alignment_offset
pv_align=$(( 1048576 + alignment_offset ))
check pv_field "${pvdev}p1" pe_start $pv_align --units b --nosuffix
pvremove "${pvdev}p1"
# test "$DM_DEV_DIR" = "/dev" || rm -f "${pvdev}p1"
fi
fi
aux cleanup_md_dev
aux wipefs_a "$dev1"
aux wipefs_a "$dev2"
# Test newer topology-aware alignment detection w/ --dataalignment override
if aux kernel_at_least 2 6 33 ; then
aux mdadm_create --metadata=1.0 --level 0 --chunk=1024 --raid-devices=2 "$dev1" "$dev2"
mddev=$(< MD_DEV)
pvdev="$mddev"
# optimal_io_size=2097152, minimum_io_size=1048576
pvcreate --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$pvdev"
# to see the processing of scanning
pvs -vvvv
check pv_field "$pvdev" pe_start "2.00m"
# now verify pe_start alignment override using --dataalignment
pvcreate --dataalignment 64k --metadatasize 128k \
--config 'devices { md_chunk_alignment=0 }' "$pvdev"
check pv_field "$pvdev" pe_start "192.00k"
aux cleanup_md_dev
aux wipefs_a "$dev1"
aux wipefs_a "$dev2"
fi
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