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Diffstat (limited to 'experimental/kpartx/test-kpartx')
| -rwxr-xr-x | experimental/kpartx/test-kpartx | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/experimental/kpartx/test-kpartx b/experimental/kpartx/test-kpartx new file mode 100755 index 000000000..93a5abdbd --- /dev/null +++ b/experimental/kpartx/test-kpartx @@ -0,0 +1,395 @@ +#! /bin/bash + +# This is a unit test program for kpartx, in particular for deleting partitions. +# +# The rationale is the following: +# +# 1) kpartx should delete all mappings it created beforehand. +# 2) kpartx should handle partitions on dm devices and other devices +# (e.g. loop devices) equally well. +# 3) kpartx should only delete "partitions", which are single-target +# linear mappings into a block device. Other maps should not be touched. +# 4) kpartx should only delete mappings it created itself beforehand. +# In particular, it shouldn't delete LVM LVs, even if they are fully +# contained in the block device at hand and thus look like partitions +# in the first place. (For historical compatibility reasons, we allow +# such mappings to be deleted with the -f/--force flag). +# 5) DM map names may be changed, thus kpartx shouldn't rely on them to +# check whether a mapping is a partition of a particular device. It is +# legal for a partition of /dev/loop0 to be named "loop0". + +# Note: This program tries hard to clean up, but if tests fail, +# stale DM or loop devices may keep lurking around. + +# Set WORKDIR in environment to existing dir to for persistence +# WARNING: existing files will be truncated. +# If empty, test will be done in temporary dir +: ${WORKDIR:=} +# Set this environment variable to test an alternative kpartx executable +: ${KPARTX:=} +# Options to pass to kpartx always +: ${KPARTX_OPTS:=-s} +# Time to wait for device nodes to appear (microseconds) +# Waiting is only needed if "s" is not in $KPARTX_OPTS +: ${WAIT_US:=0} + +# IMPORTANT: The ERR trap is essential for this program to work correctly! +#trap 'LINE=$LINENO; trap - ERR; echo "== error in $BASH_COMMAND on line $LINE ==" >&2; ls -la /dev/mapper; read a; exit 1' ERR +trap 'cleanup' 0 + +CLEANUP=: +cleanup() { + trap - ERR + trap - 0 + if [[ $OK ]]; then + echo == all ${ALL_PASS} tests completed successfully == >&2 + else + printf "== Final Results ==\n%s of %s failed!\n\n" "${ALL_FAIL}" "$(( ALL_PASS + ALL_FAIL ))" >&2 + fi + eval "$CLEANUP" &>/dev/null +} + +push_cleanup() { + CLEANUP="$@;$CLEANUP" +} + +pop_cleanup() { + # CAUTION: simplistic + CLEANUP=${CLEANUP#*;} +} + +step() { + STEP="$@" + + if [ $PASS -gt 0 -o $FAIL -gt 0 ] + then + printf "PASS: %s FAIL: %s\n\n" "${PASS}" "${FAIL}" + PASS=0 + FAIL=0 + fi + + echo == Test step: $STEP == >&2 +} + +mk_partitions() { + parted -s $1 mklabel msdos + parted -s -- $1 mkpart prim ext2 1MiB -1s +} + +wipe_ptable() { + dd if=/dev/zero of=$1 bs=1b count=1 +} + +usleep() { + if which usleep >/dev/null 2>&1 + then + env usleep "${1}" + else + sleep $( echo "${1}" / 1000000.0 | bc ) + fi +} + +invoke_kpartx() { + $KPARTX $KPARTX_OPTS "${@}" + usleep "${WAIT_US}" +} + +assert_exists() { + local result=0 + while [ "${1}" ] + do + if [ -b "$(readlink -f "${1}")" ] + then + PASS=$(( PASS + 1 )) + ALL_PASS=$(( ALL_PASS + 1 )) + else + FAIL=$(( FAIL + 1 )) + ALL_FAIL=$(( ALL_FAIL + 1 )) + echo "assert_exists: Device does not exist when it should: ${1}" + result=1 + fi + shift + done + return $result +} + +assert_unexists() { + local result=0 + while [ "${1}" ] + do + if [ ! -b "$(readlink -f "${1}")" ] + then + PASS=$(( PASS + 1 )) + ALL_PASS=$(( ALL_PASS + 1 )) + else + FAIL=$(( FAIL + 1 )) + ALL_FAIL=$(( ALL_FAIL + 1 )) + echo "assert_exists: Device exists when it should not: ${1}" + result=1 + fi + shift + done + return $result +} + +PASS=0 +ALL_PASS=0 +FAIL=0 +ALL_FAIL=0 + +step preparation + +[[ $UID -eq 0 ]] +[[ $KPARTX ]] || { + if [[ -x $PWD/kpartx/kpartx ]]; then + KPARTX=$PWD/kpartx/kpartx + else + KPARTX=$(which kpartx) + fi +} +[[ $KPARTX ]] + +FILE1=kpartx1 +FILE2=kpartx2 +FILE3=kpartx3 +FILE4=kpartx4 + +SIZE=$((1024*1024*1024)) # use bytes as units here +SECTSIZ=512 +OFFS=32 # offset of linear mapping into dev, sectors +VG=kpvg # volume group name +LV=kplv # logical vol name +LVMCONF='devices { filter = [ "a|/dev/loop.*|", r".*" ] }' + +OK= + +[[ $WORKDIR ]] || { + WORKDIR=$(mktemp -d /tmp/kpartx-XXXXXX) + push_cleanup 'rm -rf $WORKDIR' +} + +push_cleanup "cd $PWD" +cd "$WORKDIR" + +step "create loop devices" +truncate -s $SIZE $FILE1 +truncate -s $SIZE $FILE2 +truncate -s $SIZE $FILE3 +truncate -s $SIZE $FILE4 + +LO1=$(losetup -f $FILE1 --show) +push_cleanup 'losetup -d $LO1' +LO2=$(losetup -f $FILE2 --show) +push_cleanup 'losetup -d $LO2' +LO3=$(losetup -f $FILE3 --show) +push_cleanup 'losetup -d $LO3' +LO4=$(losetup -f $FILE4 --show) +push_cleanup 'losetup -d $LO4' + +[[ $LO1 && $LO2 && $LO3 && $LO4 && -b $LO1 && -b $LO2 && -b $LO3 && -b $LO4 ]] +DEV1=$(stat -c "%t:%T" $LO1) +DEV2=$(stat -c "%t:%T" $LO2) +DEV3=$(stat -c "%t:%T" $LO3) + +usleep $WAIT_US + +step "create DM devices (spans)" +# Create two linear mappings spanning two loopdevs. +# One of them gets a pathological name colliding with +# the loop device name. +# These mappings must not be removed by kpartx. +# They also serve as DM devices to test partition removal on those. + +TABLE="\ +0 $((SIZE/SECTSIZ-OFFS)) linear $DEV1 $OFFS +$((SIZE/SECTSIZ-OFFS)) $((SIZE/SECTSIZ-OFFS)) linear $DEV2 $OFFS" + +SPAN1=kpt +SPAN2=$(basename $LO2) +dmsetup create $SPAN1 <<<"$TABLE" +push_cleanup 'dmsetup remove -f $SPAN1' + +dmsetup create $SPAN2 <<<"$TABLE" +push_cleanup 'dmsetup remove -f $SPAN2' + +# This is a non-kpartx pseudo "partition" mapping +USER1=user1 +push_cleanup 'dmsetup remove -f $USER1' +dmsetup create $USER1 <<EOF +0 $((SIZE/SECTSIZ-OFFS)) linear $DEV1 $OFFS +EOF + +usleep $WAIT_US +assert_exists /dev/mapper/$SPAN1 /dev/mapper/$SPAN2 /dev/mapper/$USER1 +[[ -b /dev/mapper/$SPAN1 ]] +[[ -b /dev/mapper/$SPAN2 ]] +[[ -b /dev/mapper/$USER1 ]] + +step "create vg on $LO3" +# On the 3rd loop device, we create a VG and an LV +# The LV should not be removed by kpartx. +pvcreate --config "$LVMCONF" -f $LO3 +vgcreate --config "$LVMCONF" $VG $LO3 +push_cleanup 'vgremove --config "$LVMCONF" -f $VG' +lvcreate --config "$LVMCONF" -L $((SIZE/2))B -n $LV $VG +push_cleanup 'lvremove --config "$LVMCONF" -f $VG/$LV' +usleep $WAIT_US + +assert_exists /dev/mapper/$VG-$LV +[[ -b /dev/mapper/$VG-$LV ]] + +# dmsetup table /dev/mapper/$VG-$LV +# dmsetup info /dev/mapper/$VG-$LV + +step "create partitions on loop devices" + +mk_partitions $LO1 +mk_partitions $LO2 +mk_partitions $LO4 + +# Test invocation of kpartx with regular file here +LO2P1=/dev/mapper/$(basename $LO2)-foo1 +invoke_kpartx -a -p -foo $FILE2 +assert_exists $LO2P1 +[[ -b $LO2P1 ]] +push_cleanup 'dmsetup remove -f $(basename $LO2P1)' + +step "remove partitions with deleted ptable" +wipe_ptable $LO2 +invoke_kpartx -d $LO2 +assert_unexists $LO2P1 + +mk_partitions $LO2 +invoke_kpartx -a -p -foo $FILE2 +assert_exists $LO2P1 + +LO1P1=/dev/mapper/$(basename $LO1)-eggs1 +invoke_kpartx -a -p -eggs $LO1 +push_cleanup 'dmsetup remove -f $(basename $LO1P1)' + +usleep $WAIT_US +assert_exists $LO1P1 $LO2P1 + +# dmsetup info $LO2P1 + +# Set pathological name for partition on $LO1 (same as loop device itself) +dmsetup rename $(basename $LO1P1) $(basename $LO1) +LO1P1=/dev/mapper/$(basename $LO1) +pop_cleanup +push_cleanup 'dmsetup remove -f $(basename $LO1P1)' + +# dmsetup info $LO1P1 + +step "create partitions on DM devices" +mk_partitions /dev/mapper/$SPAN2 + +invoke_kpartx -a -p -bar /dev/mapper/$SPAN2 +SPAN2P1=/dev/mapper/${SPAN2}-bar1 + +# udev rules may have created partition mappings without UUIDs +# which aren't removed by default (if system standard kpartx doesn't +# set the UUID). Remove them using -f +push_cleanup 'invoke_kpartx -f -d /dev/mapper/$SPAN2' +push_cleanup 'dmsetup remove -f $(basename $SPAN2P1)' + +invoke_kpartx -a -p -spam /dev/mapper/$SPAN1 +SPAN1P1=/dev/mapper/${SPAN1}-spam1 +# see above +push_cleanup 'invoke_kpartx -f -d /dev/mapper/$SPAN1' +push_cleanup 'dmsetup remove -f $(basename $SPAN1P1)' + +usleep $WAIT_US +assert_exists $SPAN2P1 $SPAN1P1 + +step "rename partitions on DM device to default" +invoke_kpartx -u /dev/mapper/$SPAN1 +assert_unexists $SPAN1P1 +# This assumes that $SPAN1 ends in a non-digit +assert_exists ${SPAN1P1//-spam/} + +step "rename partitions on DM device back from default" +invoke_kpartx -u -p -spam /dev/mapper/$SPAN1 +assert_exists $SPAN1P1 +assert_unexists ${SPAN1P1//-spam/} + +step "delete partitions on DM devices" +invoke_kpartx -d /dev/mapper/$SPAN1 >&2 +usleep $WAIT_US + +assert_exists $SPAN2P1 $LO1P1 $LO2P1 +assert_unexists $SPAN1P1 + +invoke_kpartx -d /dev/mapper/$SPAN2 +usleep $WAIT_US + +assert_exists $LO1P1 $LO2P1 +assert_unexists $SPAN2P1 + +step "rename partitions on loop device" +invoke_kpartx -u -p -spam $LO2 +assert_unexists $LO2P1 +assert_exists ${LO2P1//-foo/-spam} + +step "rename partitions on loop device back" +invoke_kpartx -u -p -foo $LO2 +assert_exists $LO2P1 +assert_unexists ${LO2P1//-foo/-spam} + +step "rename partitions on loop device to default" +invoke_kpartx -u $LO2 +#read a +assert_unexists $LO2P1 +assert_exists ${LO2P1//-foo/p} +# $LO1 ends in a digit + +step "rename partitions on loop device back from default" +invoke_kpartx -u -p -foo $LO2 +assert_exists $LO2P1 +assert_unexists ${LO2P1//-foo/p} + +step "rename partitions on loop devices" +invoke_kpartx -u -p spam $LO2 + +step "delete partitions on loop devices" + +invoke_kpartx -d $LO3 + +# This will also delete the loop device +invoke_kpartx -d $FILE2 +invoke_kpartx -d $LO1 +usleep $WAIT_US + +# ls -l /dev/mapper +assert_unexists $LO1P1 +pop_cleanup +assert_unexists $LO2P1 +pop_cleanup +# spans should not have been removed +# LVs neither +assert_exists /dev/mapper/$SPAN1 /dev/mapper/$SPAN2 /dev/mapper/$USER1 /dev/mapper/$VG-$LV + +step "delete partitions on $LO3 with -f" + +invoke_kpartx -f -d $LO3 +# -d -f should delete the LV, too +assert_unexists /dev/mapper/$VG-$LV +assert_exists /dev/mapper/$SPAN1 /dev/mapper/$SPAN2 + +step "test kpartx creation/deletion on an image file with no existing loopdev" +losetup -d $LO4 + +OUTPUT=$(invoke_kpartx -v -a $FILE4 2>&1) +read loop dm < \ + <(sed -n 's/^add map \(loop[0-9]*\)p1 ([0-9]*:\([0-9]*\)).*$/\1 dm-\2/p' \ + <<<$OUTPUT) +[[ $dm && $loop ]] +push_cleanup "dmsetup remove -f /dev/$dm" +push_cleanup "losetup -d /dev/$loop" + +assert_exists /dev/mapper/${loop}p1 +invoke_kpartx -d $FILE4 +assert_unexists /dev/mapper/${loop}p1 +# /dev/$loop is _not_ automatically deleted +assert_exists /dev/${loop} + +[ $ALL_FAIL -eq 0 ] && OK=yes |