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

   1 # Put lvm-related utilities here.
   2 # This file is sourced from test-lib.sh.
   3
   4 # Copyright (C) 2007, 2008 Red Hat, Inc. All rights reserved.
   5 #
   6 # This copyrighted material is made available to anyone wishing to use,
   7 # modify, copy, or redistribute it subject to the terms and conditions
   8 # of the GNU General Public License v.2.
   9 #
  10 # You should have received a copy of the GNU General Public License
  11 # along with this program; if not, write to the Free Software Foundation,
  12 # Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  13
  14 export LVM_SUPPRESS_FD_WARNINGS=1
  15
  16 ME=$(basename "$0")
  17 warn() { echo >&2 "$ME: $@"; }
  18
  19 unsafe_losetup_()
  20 {
  21   f=$1
  22
  23   test -n "$G_dev_" \
  24     || error "Internal error: unsafe_losetup_ called before init_root_dir_"
  25
  26   # Iterate through $G_dev_/loop{,/}{0,1,2,3,4,5,6,7,8,9}
  27   for slash in '' /; do
  28     for i in 0 1 2 3 4 5 6 7 8 9; do
  29       dev=$G_dev_/loop$slash$i
  30       losetup $dev > /dev/null 2>&1 && continue;
  31       losetup "$dev" "$f" > /dev/null && { echo "$dev"; return 0; }
  32       break
  33     done
  34   done
  35
  36   return 1
  37 }
  38
  39 loop_setup_()
  40 {
  41   file=$1
  42   dd if=/dev/zero of="$file" bs=1M count=1 seek=1000 > /dev/null 2>&1 \
  43     || { warn "loop_setup_ failed: Unable to create tmp file $file"; return 1; }
  44
  45   # NOTE: this requires a new enough version of losetup
  46   dev=$(unsafe_losetup_ "$file" 2>/dev/null) \
  47     || { warn "loop_setup_ failed: Unable to create loopback device"; return 1; }
  48
  49   echo "$dev"
  50   return 0;
  51 }
  52
  53 compare_two_fields_()
  54 {
  55     local cmd1=$1;
  56     local obj1=$2;
  57     local field1=$3;
  58     local cmd2=$4;
  59     local obj2=$5;
  60     local field2=$6;
  61     local val1;
  62     local val2;
  63
  64     val1=$($cmd1 --noheadings -o $field1 $obj1)
  65     val2=$($cmd2 --noheadings -o $field2 $obj2)
  66 if test "$verbose" = "t"
  67 then
  68   echo "compare_two_fields_ $obj1($field1): $val1 $obj2($field2): $val2"
  69 fi
  70   test $val1 = $val2
  71 }
  72
  73 compare_vg_field_()
  74 {
  75     local vg1=$1;
  76     local vg2=$2;
  77     local field=$3;
  78     local val1;
  79     local val2;
  80
  81     val1=$(vgs --noheadings -o $field $vg1)
  82     val2=$(vgs --noheadings -o $field $vg2)
  83 if test "$verbose" = "t"
  84 then
  85   echo "compare_vg_field_ VG1: $val1 VG2: $val2"
  86 fi
  87   test $val1 = $val2
  88 }
  89
  90 check_vg_field_()
  91 {
  92     local vg=$1;
  93     local field=$2;
  94     local expected=$3;
  95     local actual;
  96
  97     actual=$(vgs --noheadings -o $field $vg)
  98 if test "$verbose" = "t"
  99 then
 100   echo "check_vg_field_ VG=$vg, field=$field, actual=$actual, expected=$expected"
 101 fi
 102   test $actual = $expected
 103 }
 104
 105 check_pv_field_()
 106 {
 107     local pv=$1;
 108     local field=$2;
 109     local expected=$3;
 110     local actual;
 111
 112     actual=$(pvs --noheadings -o $field $pv)
 113 if test "$verbose" = "t"
 114 then
 115   echo "check_pv_field_ PV=$pv, field=$field, actual=$actual, expected=$expected"
 116 fi
 117     test $actual = $expected
 118 }
 119
 120 check_lv_field_()
 121 {
 122     local lv=$1;
 123     local field=$2;
 124     local expected=$3;
 125     local actual;
 126
 127     actual=$(lvs --noheadings -o $field $lv)
 128 if test "$verbose" = "t"
 129 then
 130   echo "check_lv_field_ LV=$lv, field=$field, actual=$actual, expected=$expected"
 131 fi
 132   test $actual = $expected
 133 }
 134
 135 vg_validate_pvlv_counts_()
 136 {
 137         local local_vg=$1
 138         local num_pvs=$2
 139         local num_lvs=$3
 140         local num_snaps=$4
 141
 142         check_vg_field_ $local_vg pv_count $num_pvs &&
 143         check_vg_field_ $local_vg lv_count $num_lvs &&
 144         check_vg_field_ $local_vg snap_count $num_snaps
 145 }
 146
 147 dmsetup_has_dm_devdir_support_()
 148 {
 149   # Detect support for the envvar.  If it's supported, the
 150   # following command will fail with the expected diagnostic.
 151   out=$(DM_DEV_DIR=j dmsetup version 2>&1)
 152   test "$?:$out" = "1:Invalid DM_DEV_DIR envvar value." -o \
 153        "$?:$out" = "1:Invalid DM_DEV_DIR environment variable value."
 154 }
 155
 156 # set up private /dev and /etc
 157 init_root_dir_()
 158 {
 159   test -n "$test_dir_rand_" \
 160     || error "Internal error: called init_root_dir_ before" \
 161       "defining \$test_dir_rand_"
 162
 163   # Define these two globals.
 164   G_root_=$test_dir_rand_/root
 165   G_dev_=$G_root_/dev
 166
 167   export LVM_SYSTEM_DIR=$G_root_/etc
 168   export DM_DEV_DIR=$G_dev_
 169
 170   # Only the first caller does anything.
 171   mkdir -p $G_root_/etc $G_dev_ $G_dev_/mapper $G_root_/lib
 172   for i in 0 1 2 3 4 5 6 7; do
 173     mknod $G_root_/dev/loop$i b 7 $i
 174   done
 175   for i in $abs_top_builddir/dmeventd/mirror/*.so $abs_top_builddir/dmeventd/snapshot/*.so
 176   do
 177     # NOTE: This check is necessary because the loop above will give us the value
 178     # "$abs_top_builddir/dmeventd/mirror/*.so" if no files ending in 'so' exist.
 179     # This is the best way I could quickly determine to skip over this bogus value.
 180     if [ -f $i ]; then
 181       echo Setting up symlink from $i to $G_root_/lib
 182       ln -s $i $G_root_/lib
 183     fi
 184   done
 185   cat > $G_root_/etc/lvm.conf <<-EOF
 186   devices {
 187     dir = "$G_dev_"
 188     scan = "$G_dev_"
 189     filter = [ "a/loop/", "a/mirror/", "a/mapper/", "r/.*/" ]
 190     cache_dir = "$G_root_/etc"
 191     sysfs_scan = 0
 192   }
 193   log {
 194     verbose = $verboselevel
 195     syslog = 0
 196     indent = 1
 197   }
 198   backup {
 199     backup = 0
 200     archive = 0
 201   }
 202   global {
 203     library_dir = "$G_root_/lib"
 204   }
 205 EOF
 206 }
 207
 208 init_root_dir_