external/gpl2/lvm2/dist/test/test-utils.sh

   1 # Copyright (C) 2008 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 test_description="foo" # silence test-lib for now
  12 . ./test-lib.sh
  13
  14 aux() {
  15         # use just "$@" for verbose operation
  16         "$@" > /dev/null 2> /dev/null
  17         #"$@"
  18 }
  19
  20 STACKTRACE() {
  21         trap - ERR;
  22         i=0;
  23         while FUNC=${FUNCNAME[$i]}; test "$FUNC" != "main"; do
  24                 echo "$i ${FUNC}() called from ${BASH_SOURCE[$i]}:${BASH_LINENO[$i]}"
  25                 i=$(($i + 1));
  26         done
  27 }
  28
  29 teardown() {
  30         echo $LOOP
  31         echo $PREFIX
  32
  33         test -n "$PREFIX" && {
  34                 rm -rf $G_root_/dev/$PREFIX*
  35                 while dmsetup table | grep -q ^$PREFIX; do
  36                         for s in `dmsetup table | grep ^$PREFIX| awk '{ print substr($1,1,length($1)-1) }'`; do
  37                                 dmsetup resume $s 2>/dev/null > /dev/null || true
  38                                 dmsetup remove $s 2>/dev/null > /dev/null || true
  39                         done
  40                 done
  41         }
  42
  43         test -n "$LOOP" && losetup -d $LOOP
  44         test -n "$LOOPFILE" && rm -f $LOOPFILE
  45 }
  46
  47 teardown_() {
  48         teardown
  49         cleanup_ # user-overridable cleanup
  50         testlib_cleanup_ # call test-lib cleanup routine, too
  51 }
  52
  53 make_ioerror() {
  54         echo 0 10000000 error | dmsetup create ioerror
  55         dmsetup resume ioerror
  56         ln -s $G_dev_/mapper/ioerror $G_dev_/ioerror
  57 }
  58
  59 prepare_loop() {
  60         size=$1
  61         test -n "$size" || size=32
  62
  63         test -n "$LOOP" && return 0
  64         trap 'aux teardown_' EXIT # don't forget to clean up
  65         trap 'set +vex; STACKTRACE; set -vex' ERR
  66         #trap - ERR
  67
  68         LOOPFILE="$PWD/test.img"
  69         dd if=/dev/zero of="$LOOPFILE" bs=$((1024*1024)) count=1 seek=$(($size-1))
  70         if LOOP=`losetup -s -f "$LOOPFILE" 2>/dev/null`; then
  71                 return 0
  72         elif LOOP=`losetup -f` && losetup $LOOP "$LOOPFILE"; then
  73                 # no -s support
  74                 return 0
  75         else
  76                 # no -f support
  77                 # Iterate through $G_dev_/loop{,/}{0,1,2,3,4,5,6,7}
  78                 for slash in '' /; do
  79                         for i in 0 1 2 3 4 5 6 7; do
  80                                 local dev=$G_dev_/loop$slash$i
  81                                 ! losetup $dev >/dev/null 2>&1 || continue
  82                                 # got a free
  83                                 losetup "$dev" "$LOOPFILE"
  84                                 LOOP=$dev
  85                                 break
  86                         done
  87                         if [ -n "$LOOP" ]; then
  88                                 break
  89                         fi
  90                 done
  91                 test -n "$LOOP" # confirm or fail
  92                 return 0
  93         fi
  94         exit 1 # should not happen
  95 }
  96
  97 prepare_devs() {
  98         local n="$1"
  99         test -z "$n" && n=3
 100         local devsize="$2"
 101         test -z "$devsize" && devsize=33
 102         local pvname="$3"
 103         test -z "$pvname" && pvname="pv"
 104
 105         prepare_loop $(($n*$devsize))
 106
 107         PREFIX="LVMTEST$$"
 108
 109         if ! loopsz=`blockdev --getsz $LOOP 2>/dev/null`; then
 110                 loopsz=`blockdev --getsize $LOOP 2>/dev/null`
 111         fi
 112
 113         local size=$(($loopsz/$n))
 114
 115         for i in `seq 1 $n`; do
 116                 local name="${PREFIX}$pvname$i"
 117                 local dev="$G_dev_/mapper/$name"
 118                 eval "dev$i=$dev"
 119                 devs="$devs $dev"
 120                 echo 0 $size linear $LOOP $((($i-1)*$size)) > $name.table
 121                 dmsetup create $name $name.table
 122                 dmsetup resume $name
 123         done
 124
 125     # set up some default names
 126         vg=${PREFIX}vg
 127         vg1=${PREFIX}vg1
 128         vg2=${PREFIX}vg2
 129         lv=LV
 130         lv1=LV1
 131         lv2=LV2
 132         lv3=LV3
 133         lv4=LV4
 134 }
 135
 136 disable_dev() {
 137         for dev in "$@"; do
 138         # first we make the device inaccessible
 139                 echo 0 10000000 error | dmsetup load $dev
 140                 dmsetup resume $dev
 141         # now let's try to get rid of it if it's unused
 142         #dmsetup remove $dev
 143         done
 144 }
 145
 146 enable_dev() {
 147         for dev in "$@"; do
 148                 local name=`echo "$dev" | sed -e 's,.*/,,'`
 149                 dmsetup create $name $name.table || dmsetup load $name $name.table
 150                 dmsetup resume $dev
 151         done
 152 }
 153
 154 backup_dev() {
 155         for dev in "$@"; do
 156                 dd if=$dev of=$dev.backup bs=1024
 157         done
 158 }
 159
 160 restore_dev() {
 161         for dev in "$@"; do
 162                 test -e $dev.backup || {
 163                         echo "Internal error: $dev not backed up, can't restore!"
 164                         exit 1
 165                 }
 166                 dd of=$dev if=$dev.backup bs=1024
 167         done
 168 }
 169
 170 prepare_pvs() {
 171         prepare_devs "$@"
 172         pvcreate $devs
 173 }
 174
 175 prepare_vg() {
 176         prepare_pvs "$@"
 177         vgcreate $vg $devs
 178 }
 179
 180 prepare_lvmconf() {
 181         local filter="$1"
 182         test -z "$filter" && \
 183                 filter='[ "a/dev\/mirror/", "a/dev\/mapper\/.*pv[0-9_]*$/", "r/.*/" ]'
 184         cat > $G_root_/etc/lvm.conf <<-EOF
 185   devices {
 186     dir = "$G_dev_"
 187     scan = "$G_dev_"
 188     filter = $filter
 189     cache_dir = "$G_root_/etc"
 190     sysfs_scan = 0
 191   }
 192   log {
 193     verbose = $verboselevel
 194     syslog = 0
 195     indent = 1
 196   }
 197   backup {
 198     backup = 0
 199     archive = 0
 200   }
 201   global {
 202     library_dir = "$G_root_/lib"
 203      locking_dir = "$G_root_/var/lock/lvm"
 204   }
 205 EOF
 206 }
 207
 208 set -vexE
 209 aux prepare_lvmconf
 210