2 # FS QA Test No. generic/018
4 # Basic defragmentation sanity tests
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7 # Copyright (c) 2009 Eric Sandeen. All Rights Reserved.
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25 seqres=$RESULT_DIR/$seq
26 echo "QA output created by $seq"
30 status=1 # failure is the default!
31 trap "_cleanup; exit \$status" 0 1 2 3 15
39 # get standard environment, filters and checks
44 # real QA test starts here
48 # We require scratch so that we'll have free contiguous space
50 _scratch_mkfs >/dev/null 2>&1
55 fragfile=$SCRATCH_MNT/fragfile.$$
59 # Craft some fragmented files, defrag them, check the result.
62 echo "zero-length file:" | tee -a $seqres.full
64 _defrag --before 0 --after 0 $fragfile
66 echo "Sparse file (no blocks):" | tee -a $seqres.full
67 $XFS_IO_PROG -f -c "truncate 1m" $fragfile
68 _defrag --before 0 --after 0 $fragfile
70 echo "Contiguous file:" | tee -a $seqres.full
71 $XFS_IO_PROG -f -c "pwrite -b $((4 * bsize)) 0 $((4 * bsize))" $fragfile \
73 _defrag --before 1 --after 1 $fragfile
75 echo "Write backwards sync, but contiguous - should defrag to 1 extent" | tee -a $seqres.full
76 for i in `seq 9 -1 0`; do
77 $XFS_IO_PROG -fs -c "pwrite -b $bsize $((i * bsize)) $bsize" $fragfile \
81 # Accept fewer fragments than we might expect; we don't have perfect control.
82 _defrag --max_before 10 --min_before 5 --after 1 $fragfile
84 echo "Write backwards sync leaving holes - defrag should do nothing" | tee -a $seqres.full
85 for i in `seq 31 -2 0`; do
86 $XFS_IO_PROG -fs -c "pwrite -b $bsize $((i * bsize)) $bsize" $fragfile \
89 _defrag --before 16 --after 16 $fragfile
91 echo "Write forwards sync leaving holes - defrag should do nothing" | tee -a $seqres.full
92 for i in `seq 0 2 31`; do
93 $XFS_IO_PROG -fs -c "pwrite -b $bsize $((i * bsize)) $bsize" $fragfile \
96 _defrag --before 16 --after 16 $fragfile