test_ext4fixup

   1 #!/bin/bash
   2
   3 typeset -i I ITERATIONS PHASE LOC COUNT MAXCOUNT
   4
   5 ME=`basename $0`
   6
   7 if [ "$#" -ne 3 ]
   8 then
   9   echo "$ME: Usage: $ME <iterations> <maxcount> <filesystem_image>" >&2
  10   exit 1;
  11 fi
  12
  13 ITERATIONS="$1"
  14 MAXCOUNT="$2"
  15 ORIG_FS_IMAGE="$3"
  16 FIXED_FS_IMAGE="/tmp/fixedfsimage.$$"
  17 NEW_FS_IMAGE="/tmp/newfsimage.$$"
  18
  19 if [ ! -f "$ORIG_FS_IMAGE" ]
  20 then
  21   echo "$ME: Filesystem image $NEW_FS_IMAGE does not exist" >&2
  22   exit 1
  23 fi
  24
  25 trap "rm -f $NEW_FS_IMAGE $FIXED_FS_IMAGE" 0 1 2 3 15
  26
  27 rm -f "$NEW_FS_IMAGE" "$FIXED_FS_IMAGE"
  28
  29 # Create the fixed image to compare against
  30 cp "$ORIG_FS_IMAGE" "$FIXED_FS_IMAGE"
  31 ext4fixup "$FIXED_FS_IMAGE"
  32
  33 if [ "$?" -ne 0 ]
  34 then
  35   echo "$ME: ext4fixup failed!\n"
  36   exit 1
  37 fi
  38
  39 I=0
  40 while [ "$I" -lt "$ITERATIONS" ]
  41 do
  42   # There is also a phase 4, which is writing out the updated superblocks and
  43   # block group descriptors.  Test the with a separate script.
  44   let PHASE="$RANDOM"%3         # 0 to 2
  45   let PHASE++                   # 1 to 3
  46   let LOC="$RANDOM"%2           # 0 to 1
  47   let LOC++                     # 1 to 2
  48   let COUNT="$RANDOM"%"$MAXCOUNT"
  49
  50   # Make a copy of the original image to fixup
  51   cp "$ORIG_FS_IMAGE" "$NEW_FS_IMAGE"
  52
  53   # Run the fixup tool, but die partway through to see if we can recover
  54   ext4fixup -d "$PHASE,$LOC,$COUNT" "$NEW_FS_IMAGE" 2>/dev/null
  55
  56   # run it again without -d to have it finish the job
  57   ext4fixup "$NEW_FS_IMAGE"
  58
  59   if cmp "$FIXED_FS_IMAGE" "$NEW_FS_IMAGE"
  60   then
  61     :
  62   else
  63     echo "$ME: test failed with parameters $PHASE, $LOC, $COUNT"
  64     exit 1
  65   fi
  66
  67   rm -f "$NEW_FS_IMAGE"
  68
  69   let I++
  70 done
  71