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 #-----------------------------------------------------------------------
30 owner=david@fromorbit.com
33 echo "QA output created by $seq"
37 status=1 # failure is the default!
44 trap "_cleanup ; exit \$status" 0 1 2 3 15
46 # get standard environment, filters and checks
50 # real QA test starts here
57 [ "$XFS_FSR_PROG" = "" ] && _notrun "xfs_fsr not found"
59 # create freespace holes of 1-3 blocks in length
61 # This is done to ensure that defragmented files have roughly 1/3 the
62 # number of extents they started with. This will ensure we get
63 # transistions from btree format (say 15 extents) to extent format
64 # (say 5 extents) and lots of variations around that dependent on the
65 # number of attributes in the files being defragmented.
67 # We have to make sure there are enough free inodes for the test to
68 # pass without needing to allocate new clusters during the test.
69 # With such fragemented free space, that will fail.
73 _file="$SCRATCH_MNT/not_free"
74 _dir="$SCRATCH_MNT/saved"
76 # allocate inode space
78 for i in `seq 0 1 1000`; do
81 for i in `seq 0 63 1000`; do
84 for i in `seq 0 1 1000`; do
88 $XFS_IO_PROG -fs -c "resvsp 0 40000k" $_file > /dev/null 2>&1
90 for i in `seq 0 8 40000`; do
91 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
94 for i in `seq 0 28 40000`; do
95 $XFS_IO_PROG -f -c "unresvsp ${i}k 4k" $_file \
100 # and now use up all the remaining extents larger than 3 blocks
101 $XFS_IO_PROG -fs -c "resvsp 0 4m" $_file.large > /dev/null 2>&1
106 for foo in `seq 0 1 $1`; do
107 $SETFATTR_PROG -n user.$foo -v 0xbabe $2
113 size=`expr \( $1 + 1 \) \* 4096`
114 $XFS_IO_PROG -f -c "truncate $size" $2 > /dev/null 2>&1
115 for foo in `seq $1 -1 0`; do
117 $XFS_IO_PROG -f -c "resvsp $offset 4096" $2 > /dev/null 2>&1
121 # create the designated file with a certain number of attributes and a certain
122 # number of data extents. Reverse order synchronous data writes are used to
123 # create fragmented files, though with the way the filesystem freespace is
124 # fragmented, this is probably not necessary. Create the attributes first so
125 # that they cause the initial fork offset pressure to move it about.
127 create_target_attr_first()
135 create_attrs $nattrs $target
136 create_data $file_blocks $target
139 # Same as create_target_attr_first, but this time put the attributes on after
140 # the data extents have been created. This puts different pressure on the
141 # inode fork offset, so should exercise the kernel code differently and give us
142 # a different pattern of fork offsets to work with compared to creating the
145 create_target_attr_last()
153 create_data $file_blocks $target
154 create_attrs $nattrs $target
159 # use a small filesystem so we can control freespace easily
160 _scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seq.full 2>&1
164 # unmount and remount to reset all allocator indexes
168 # create a range of source files, then fsr them to a known size
170 # This assumes 256 byte inodes.
172 # n = number of target fragments for xfs_fsr
173 # - only a guideline, but forces multiple fragments via sync writes
174 # - start at 4 as that typically covers all extent format situations
175 # - end at 12 as that is beyond the maximum that canbe fit in extent
177 # i = number of 2 byte attributes on the file
178 # - it takes 6 attributes to change the fork offset from the start value
179 # of 120 bytes to 112 bytes, so we start at 5.
180 # - 15 is enough to push to btree format, so we stop there.
181 # j = number of data extents on the file
182 # - start in extent format, but we also want btree format as well, so
183 # start at 5 so that the number of attributes determines the starting
185 # - need enough extents that if they are all 3 blocks in length the final
186 # format will be dependent on the number of attributes on the inode. 20
187 # initial single block extents gives us 6-8 extents after defrag which
188 # puts us right on the threshold of what the extent format can hold.
190 targ=$SCRATCH_MNT/fsr_test_file.$$
191 for n in `seq 4 1 12`; do
192 echo "*** n == $n ***" >> $seq.full
193 for i in `seq 5 1 15`; do
194 for j in `seq 5 1 20`; do
195 create_target_attr_first $i $j $targ.$i.$j >> $seq.full 2>&1
197 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
198 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seq.full 2>&1
199 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
200 for j in `seq 5 1 20`; do
201 create_target_attr_last $i $j $targ.$i.$j >> $seq.full 2>&1
203 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
204 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seq.full 2>&1
205 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
210 echo "--- silence is golden ---"