4 # Basic defragmentation sanity tests
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7 # Copyright (c) 2009 Eric Sandeen. All Rights Reserved.
9 # This program is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU General Public License as
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13 # This program is distributed in the hope that it would be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
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20 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #-----------------------------------------------------------------------
24 owner=sandeen@sandeen.net
27 echo "QA output created by $seq"
31 status=1 # failure is the default!
32 trap "_cleanup; exit \$status" 0 1 2 3 15
41 # get standard environment, filters and checks
46 # real QA test starts here
47 _supported_fs xfs ext4
51 # We require scratch so that we'll have free contiguous space
53 _scratch_mkfs >/dev/null 2>&1
58 fragfile=$SCRATCH_MNT/fragfile.$$
62 # Craft some fragmented files, defrag them, check the result.
64 echo "zero-length file:" | tee -a $seq.full
68 echo "Sparse file (no blocks):" | tee -a $seq.full
69 xfs_io -F -f -c "truncate 1m" $fragfile
72 echo "Contiguous file:" | tee -a $seq.full
73 dd if=/dev/zero of=$fragfile bs=4k count=4 &>/dev/null
76 echo "Write backwards sync, but contiguous - should defrag to 1 extent" | tee -a $seq.full
77 for I in `seq 9 -1 0`; do
78 dd if=/dev/zero of=$fragfile bs=4k count=1 conv=notrunc seek=$I oflag=sync &>/dev/null
82 echo "Write backwards sync leaving holes - defrag should do nothing" | tee -a $seq.full
83 for I in `seq 31 -2 0`; do
84 dd if=/dev/zero of=$fragfile bs=4k count=1 conv=notrunc seek=$I oflag=sync &>/dev/null
88 echo "Write forwards sync leaving holes - defrag should do nothing" | tee -a $seq.full
89 for I in `seq 0 2 31`; do
90 dd if=/dev/zero of=$fragfile bs=4k count=1 conv=notrunc seek=$I oflag=sync &>/dev/null