5 # run xfs_fsr over the test filesystem to give it a wide and varied set of
6 # inodes to try to defragment. This is effectively a crash/assert failure
7 # test looking for corruption induced by the kernel inadequately checking
8 # the indoes to be swapped. It also is good for validating fsr's attribute fork
11 #-----------------------------------------------------------------------
12 # Copyright (c) 2010 Dave Chinner. All Rights Reserved.
14 # This program is free software; you can redistribute it and/or
15 # modify it under the terms of the GNU General Public License as
16 # published by the Free Software Foundation.
18 # This program is distributed in the hope that it would be useful,
19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 # GNU General Public License for more details.
23 # You should have received a copy of the GNU General Public License
24 # along with this program; if not, write the Free Software Foundation,
25 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #-----------------------------------------------------------------------
31 seqres=$RESULT_DIR/$seq
32 echo "QA output created by $seq"
36 status=1 # failure is the default!
43 trap "_cleanup ; exit \$status" 0 1 2 3 15
45 # get standard environment, filters and checks
49 # real QA test starts here
56 [ "$XFS_FSR_PROG" = "" ] && _notrun "xfs_fsr not found"
58 # create freespace holes of 1-3 blocks in length
60 # This is done to ensure that defragmented files have roughly 1/3 the
61 # number of extents they started with. This will ensure we get
62 # transistions from btree format (say 15 extents) to extent format
63 # (say 5 extents) and lots of variations around that dependent on the
64 # number of attributes in the files being defragmented.
66 # We have to make sure there are enough free inodes for the test to
67 # pass without needing to allocate new clusters during the test.
68 # With such fragemented free space, that will fail.
72 _file="$SCRATCH_MNT/not_free"
73 _dir="$SCRATCH_MNT/saved"
75 # allocate inode space
77 for i in `seq 0 1 1000`; do
80 for i in `seq 0 63 1000`; do
83 for i in `seq 0 1 1000`; do
87 $XFS_IO_PROG -fs -c "resvsp 0 40000k" $_file > /dev/null 2>&1
89 for i in `seq 0 8 40000`; do
90 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
93 for i in `seq 0 28 40000`; do
94 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
99 # and now use up all the remaining extents larger than 3 blocks
100 $XFS_IO_PROG -fs -c "resvsp 0 4m" $_file.large > /dev/null 2>&1
105 for foo in `seq 0 1 $1`; do
106 $SETFATTR_PROG -n user.$foo -v 0xbabe $2
112 size=`expr \( $1 + 1 \) \* 4096`
113 $XFS_IO_PROG -f -c "truncate $size" $2 > /dev/null 2>&1
114 for foo in `seq $1 -1 0`; do
116 $XFS_IO_PROG -f -c "resvsp $offset 4096" $2 > /dev/null 2>&1
120 # create the designated file with a certain number of attributes and a certain
121 # number of data extents. Reverse order synchronous data writes are used to
122 # create fragmented files, though with the way the filesystem freespace is
123 # fragmented, this is probably not necessary. Create the attributes first so
124 # that they cause the initial fork offset pressure to move it about.
126 create_target_attr_first()
134 create_attrs $nattrs $target
135 create_data $file_blocks $target
138 # Same as create_target_attr_first, but this time put the attributes on after
139 # the data extents have been created. This puts different pressure on the
140 # inode fork offset, so should exercise the kernel code differently and give us
141 # a different pattern of fork offsets to work with compared to creating the
144 create_target_attr_last()
152 create_data $file_blocks $target
153 create_attrs $nattrs $target
158 # use a small filesystem so we can control freespace easily
159 _scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
163 # unmount and remount to reset all allocator indexes
167 # create a range of source files, then fsr them to a known size
169 # This assumes 256 byte inodes.
171 # n = number of target fragments for xfs_fsr
172 # - only a guideline, but forces multiple fragments via sync writes
173 # - start at 4 as that typically covers all extent format situations
174 # - end at 12 as that is beyond the maximum that canbe fit in extent
176 # i = number of 2 byte attributes on the file
177 # - it takes 6 attributes to change the fork offset from the start value
178 # of 120 bytes to 112 bytes, so we start at 5.
179 # - 15 is enough to push to btree format, so we stop there.
180 # j = number of data extents on the file
181 # - start in extent format, but we also want btree format as well, so
182 # start at 5 so that the number of attributes determines the starting
184 # - need enough extents that if they are all 3 blocks in length the final
185 # format will be dependent on the number of attributes on the inode. 20
186 # initial single block extents gives us 6-8 extents after defrag which
187 # puts us right on the threshold of what the extent format can hold.
189 targ=$SCRATCH_MNT/fsr_test_file.$$
190 for n in `seq 4 1 12`; do
191 echo "*** n == $n ***" >> $seqres.full
192 for i in `seq 5 1 15`; do
193 for j in `seq 5 1 20`; do
194 create_target_attr_first $i $j $targ.$i.$j >> $seqres.full 2>&1
196 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
197 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seqres.full 2>&1
198 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
199 for j in `seq 5 1 20`; do
200 create_target_attr_last $i $j $targ.$i.$j >> $seqres.full 2>&1
202 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
203 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seqres.full 2>&1
204 xfs_bmap -vp $targ.$i.* >> $seqres.full 2>&1
209 echo "--- silence is golden ---"