2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2010 Dave Chinner. All Rights Reserved.
8 # run xfs_fsr over the test filesystem to give it a wide and varied set of
9 # inodes to try to defragment. This is effectively a crash/assert failure
10 # test looking for corruption induced by the kernel inadequately checking
11 # the indoes to be swapped. It also is good for validating fsr's attribute fork
15 seqres=$RESULT_DIR/$seq
16 echo "QA output created by $seq"
20 status=1 # failure is the default!
27 trap "_cleanup ; exit \$status" 0 1 2 3 15
29 # get standard environment, filters and checks
33 # real QA test starts here
39 [ "$XFS_FSR_PROG" = "" ] && _notrun "xfs_fsr not found"
41 # create freespace holes of 1-3 blocks in length
43 # This is done to ensure that defragmented files have roughly 1/3 the
44 # number of extents they started with. This will ensure we get
45 # transistions from btree format (say 15 extents) to extent format
46 # (say 5 extents) and lots of variations around that dependent on the
47 # number of attributes in the files being defragmented.
49 # We have to make sure there are enough free inodes for the test to
50 # pass without needing to allocate new clusters during the test.
51 # With such fragemented free space, that will fail.
55 _file="$SCRATCH_MNT/not_free"
56 _dir="$SCRATCH_MNT/saved"
58 # allocate inode space
60 for i in `seq 0 1 1000`; do
63 for i in `seq 0 63 1000`; do
66 for i in `seq 0 1 1000`; do
70 $XFS_IO_PROG -fs -c "resvsp 0 40000k" $_file > /dev/null 2>&1
72 for i in `seq 0 8 40000`; do
73 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
76 for i in `seq 0 28 40000`; do
77 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
82 # and now use up all the remaining extents larger than 3 blocks
83 $XFS_IO_PROG -fs -c "resvsp 0 4m" $_file.large > /dev/null 2>&1
88 for foo in `seq 0 1 $1`; do
89 $SETFATTR_PROG -n user.$foo -v 0xbabe $2
95 size=`expr \( $1 + 1 \) \* 4096`
96 $XFS_IO_PROG -f -c "truncate $size" $2 > /dev/null 2>&1
97 for foo in `seq $1 -1 0`; do
99 $XFS_IO_PROG -f -c "resvsp $offset 4096" $2 > /dev/null 2>&1
103 # create the designated file with a certain number of attributes and a certain
104 # number of data extents. Reverse order synchronous data writes are used to
105 # create fragmented files, though with the way the filesystem freespace is
106 # fragmented, this is probably not necessary. Create the attributes first so
107 # that they cause the initial fork offset pressure to move it about.
109 create_target_attr_first()
117 create_attrs $nattrs $target
118 create_data $file_blocks $target
121 # Same as create_target_attr_first, but this time put the attributes on after
122 # the data extents have been created. This puts different pressure on the
123 # inode fork offset, so should exercise the kernel code differently and give us
124 # a different pattern of fork offsets to work with compared to creating the
127 create_target_attr_last()
135 create_data $file_blocks $target
136 create_attrs $nattrs $target
139 # use a small filesystem so we can control freespace easily
140 _scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
144 # unmount and remount to reset all allocator indexes
148 # create a range of source files, then fsr them to a known size
150 # This assumes 256 byte inodes.
152 # n = number of target fragments for xfs_fsr
153 # - only a guideline, but forces multiple fragments via sync writes
154 # - start at 4 as that typically covers all extent format situations
155 # - end at 12 as that is beyond the maximum that canbe fit in extent
157 # i = number of 2 byte attributes on the file
158 # - it takes 6 attributes to change the fork offset from the start value
159 # of 120 bytes to 112 bytes, so we start at 5.
160 # - 15 is enough to push to btree format, so we stop there.
161 # j = number of data extents on the file
162 # - start in extent format, but we also want btree format as well, so
163 # start at 5 so that the number of attributes determines the starting
165 # - need enough extents that if they are all 3 blocks in length the final
166 # format will be dependent on the number of attributes on the inode. 20
167 # initial single block extents gives us 6-8 extents after defrag which
168 # puts us right on the threshold of what the extent format can hold.
170 targ=$SCRATCH_MNT/fsr_test_file.$$
171 for n in `seq 4 1 12`; do
172 echo "*** n == $n ***" >> $seqres.full
173 for i in `seq 5 1 15`; do
174 for j in `seq 5 1 20`; do
175 create_target_attr_first $i $j $targ.$i.$j >> $seqres.full 2>&1
177 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
178 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seqres.full 2>&1
179 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
180 for j in `seq 5 1 20`; do
181 create_target_attr_last $i $j $targ.$i.$j >> $seqres.full 2>&1
183 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
184 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seqres.full 2>&1
185 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
190 echo "--- silence is golden ---"