common/defrag

   1 ##/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2009 Eric Sandeen. All Rights Reserved.
   4 #
   5 # Functions useful for defragmentation tests
   6
   7 _require_defrag()
   8 {
   9     case "$FSTYP" in
  10     xfs)
  11         # xfs_fsr does preallocates, require "falloc"
  12         _require_xfs_io_command "falloc"
  13         DEFRAG_PROG="$XFS_FSR_PROG"
  14         ;;
  15     ext4|ext4dev)
  16         testfile="$TEST_DIR/$$-test.defrag"
  17         donorfile="$TEST_DIR/$$-donor.defrag"
  18         bsize=`_get_block_size $TEST_DIR`
  19         $XFS_IO_PROG -f -c "pwrite -b $bsize 0 $bsize" $testfile > /dev/null
  20         cp $testfile $donorfile
  21         echo $testfile | $here/src/e4compact -v -f $donorfile | \
  22                 grep -q "err:95"
  23         if [ $? -eq 0 ]; then
  24                 rm -f $testfile $donorfile 2>&1 > /dev/null
  25                 _notrun "$FSTYP test filesystem doesn't support online defrag"
  26         fi
  27         rm -f $testfile $donorfile 2>&1 > /dev/null
  28         DEFRAG_PROG="$E4DEFRAG_PROG"
  29         ;;
  30     btrfs)
  31         DEFRAG_PROG="$BTRFS_UTIL_PROG filesystem defragment"
  32         ;;
  33     *)
  34         _notrun "defragmentation not supported for fstype \"$FSTYP\""
  35         ;;
  36     esac
  37
  38     _require_command "$DEFRAG_PROG" defragment
  39     _require_xfs_io_command "fiemap"
  40 }
  41
  42 _extent_count()
  43 {
  44         $XFS_IO_PROG -c "fiemap" $1  >> $seqres.full 2>&1
  45         $XFS_IO_PROG -c "fiemap" $1 | tail -n +2 | grep -v hole | wc -l| $AWK_PROG '{print $1}'
  46 }
  47
  48 _check_extent_count()
  49 {
  50         min=$1
  51         max=$2
  52         ext_cnt=$3
  53
  54         # Return failure if $3 isn't between $1 and $2; let caller decide
  55         # action if it's not, we just return status here.
  56         if [ "$min" -gt "$ext_cnt" ]; then
  57                 echo "Found $ext_cnt extents  min:$max"
  58                 return 1;
  59         fi
  60         if [ "$max" -ne -1 ] && [ "$ext_cnt" -gt "$max" ]; then
  61                 echo "Found $ext_cnt max: $max"
  62                 return 1;
  63         fi
  64
  65         if [ $max -ne $min ]; then
  66             echo "in_range($min, $max)"
  67         else
  68             echo "$ext_cnt"
  69         fi
  70         # success
  71         return 0
  72 }
  73
  74 # Defrag file, check it, and remove it.
  75 _defrag()
  76 {
  77         min_before=0
  78         max_before=-1
  79         min_after=0
  80         max_after=-1
  81         csum=1
  82         mtime=1
  83
  84         while [ $# -gt 1 ]
  85         do
  86             case $1
  87                 in
  88                 --min_before)
  89                     [ -z "$2" ] && _fail "missing argument for --min_before"
  90                     min_before=$2
  91                     shift
  92                     ;;
  93                 --max_before)
  94                     [ -z "$2" ] && _fail "missing argument for --max_before"
  95                     max_before=$2
  96                     shift
  97                     ;;
  98                 --min_after)
  99                     [ -z "$2" ] && _fail "missing argument for --min_after"
 100                     min_after=$2
 101                     shift
 102                     ;;
 103                 --max_after)
 104                     [ -z "$2" ] && _fail "missing argument for --max_after"
 105                     max_after=$2
 106                     shift
 107                     ;;
 108                 --before)
 109                     [ -z "$2" ] && _fail "missing argument for --before"
 110                     min_before=$2
 111                     max_before=$2
 112                     shift
 113                     ;;
 114                 --after)
 115                     [ -z "$2" ] && _fail "missing argument for --after"
 116                     min_after=$2
 117                     max_after=$2
 118                     shift
 119                     ;;
 120                 --no_csum)
 121                     csum=
 122                     ;;
 123                 --no_mtime)
 124                     mtime=
 125                     ;;
 126                 --no_unlink)
 127                     no_unlink=1
 128                     ;;
 129                 *)
 130                     _fail "invalid argument to common/dump function: $1"
 131                     ;;
 132             esac
 133             shift
 134         done
 135
 136         echo -n "Before: "
 137         ext_before=$(_extent_count $1)
 138         _check_extent_count $min_before $max_before $ext_before
 139         [ $? -eq 0 ] || _notrun "Could not adequately fragment file"
 140
 141         [ ! -z $csum ] && CSUM_BEFORE=`md5sum $1`
 142         STAT_BEFORE=`stat -c "a: %x m: %y c: %z" $1`
 143         $DEFRAG_PROG -v $1 >> $seqres.full 2>&1
 144
 145         _scratch_cycle_mount
 146         STAT_AFTER=`stat -c "a: %x m: %y c: %z" $1`
 147         [ ! -z $csum ] && CSUM_AFTER=`md5sum $1`
 148
 149         echo -n "After: "
 150         ext_after=$(_extent_count $1)
 151         _check_extent_count $min_after $max_after $ext_after
 152         [ $? -eq 0 ] || _fail "Failed to adequately defragment file"
 153
 154         [ "$ext_before" -lt "$ext_after" ] && \
 155                 _fail "Number of extents increased after defragmentation," \
 156                       " before:$ext_before, after:$ext_after"
 157         if [ ! -z $csum ] && [ "$CSUM_BEFORE" != "$CSUM_AFTER" ]; then
 158                 _fail "file checksum changed post-defrag ($CSUM_BEFORE/$CSUM_AFTER)"
 159         fi
 160         if [ ! -z $mtime ] && [ "$STAT_BEFORE" != "$STAT_AFTER" ]; then
 161                 _fail "file timestamps changed post-defrag:\n$STAT_BEFORE\n$STAT_AFTER"
 162         fi
 163         [ -z $no_unlink ] && rm -f $1
 164 }
 165