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 $seq"
37 status=1 # failure is the default!
44 trap "_cleanup ; exit \$status" 0 1 2 3 15
46 # get standard environment, filters and checks
50 # real QA test starts here
55 [ "$XFS_FSR_PROG" = "" ] && _notrun "xfs_fsr not found"
57 # create freespace holes of 1-3 blocks in length
59 # This is done to ensure that defragmented files have roughly 1/3 the
60 # number of extents they started with. This will ensure we get
61 # transistions from btree format (say 15 extents) to extent format
62 # (say 5 extents) and lots of variations around that dependent on the
63 # number of attributes in the files being defragmented.
67 _file="$SCRATCH_MNT/not_free"
69 for i in `seq 0 1 10000`; do
74 for i in `seq 0 2 10000`; do
77 for i in `seq 0 7 10000`; do
82 # and now use up all the remaining extents larger than 3 blocks
83 dd if=/dev/zero of=$_file.large bs=4k count=1024 > /dev/null 2>&1
89 for foo in `seq 0 1 $1`; do
90 setfattr -n user.$foo -v 0xbabe $2
96 for foo in `seq $1 -1 0`; do
98 $XFS_IO_PROG -f -c "pwrite $offset 4096" -c "fsync" $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
141 # use a small filesystem so we can control freespace easily
142 _scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seq.full 2>&1
146 # unmount and remount to reset all allocator indexes
150 # create a range of source files, then fsr them to a known size
152 # This assumes 256 byte inodes.
154 # n = number of target fragments for xfs_fsr
155 # - only a guideline, but forces multiple fragments via sync writes
156 # - start at 4 as that typically covers all extent format situations
157 # - end at 12 as that is beyond the maximum that canbe fit in extent
159 # i = number of 2 byte attributes on the file
160 # - it takes 6 attributes to change the fork offset from the start value
161 # of 120 bytes to 112 bytes, so we start at 5.
162 # - 15 is enough to push to btree format, so we stop there.
163 # j = number of data extents on the file
164 # - start in extent format, but we also want btree format as well, so
165 # start at 5 so that the number of attributes determines the starting
167 # - need enough extents that if they are all 3 blocks in length the final
168 # format will be dependent on the number of attributes on the inode. 20
169 # initial single block extents gives us 6-8 extents after defrag which
170 # puts us right on the threshold of what the extent format can hold.
172 targ=$SCRATCH_MNT/fsr_test_file.$$
173 for n in `seq 4 1 12`; do
174 echo "*** n == $n ***" >> $seq.full
175 for i in `seq 5 1 15`; do
176 for j in `seq 5 1 20`; do
177 create_target_attr_first $i $j $targ.$i.$j >> $seq.full 2>&1
179 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seq.full 2>&1
180 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
181 for j in `seq 5 1 20`; do
182 create_target_attr_last $i $j $targ.$i.$j >> $seq.full 2>&1
184 FSRXFSTEST=true xfs_fsr -d -v -C $n $targ.$i.* >> $seq.full 2>&1
185 xfs_bmap -vp $targ.$i.* >> $seq.full 2>&1
190 echo "--- silence is golden ---"