4 # Test Full File System Hole Punching
6 #-----------------------------------------------------------------------
7 # Copyright (c) 2011 IBM Corporation. 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
11 # published by the Free Software Foundation.
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.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write the Free Software Foundation,
20 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #-----------------------------------------------------------------------
25 owner=achender@linux.vnet.ibm.com
28 echo "QA output created by $seq"
32 status=1 # failure is the default!
39 trap "_cleanup ; exit \$status" 0 1 2 3 15
41 # get standard environment, filters and checks
46 # real QA test starts here
50 _require_xfs_io_falloc_punch
54 testfile=$TEST_DIR/256.$$
59 # Fills a file system by repeatedly creating files in the given folder
60 # starting with the given file size. Files are reduced in size when
61 # they can no longer fit untill no more files can be created.
63 # This routine is used by _test_full_fs_punch to test that a hole may
64 # still be punched when the disk is full by borrowing reserved blocks.
65 # All files are created as a non root user to prevent reserved blocks
66 # from being consumed.
77 echo "USAGE: _fill_fs filesize dir block size"
81 # Creation of files or folders
82 # must not be done as root or
83 # reserved blocks will be consumed
84 _user_do "mkdir -p $dir &> /dev/null"
85 if [ $? -ne 0 ] ; then
89 if [ $file_size -lt $block_size ]
91 $file_size = $block_size
94 while [ $file_size -ge $block_size ]
97 _user_do "$XFS_IO_PROG -F -f -c \"pwrite 0 $file_size\" $dir/$file_count.bin &> /dev/null"
99 if [ -f $dir/$file_count.bin ]
101 bytes_written=`$XFS_IO_PROG -F -c "stat" $dir/$file_count.bin | grep stat.size | cut -d ' ' -f3`
104 # If there was no room to make the file,
105 # then divide it in half, and keep going
106 if [ $bytes_written -lt $file_size ]
108 file_size=$(( $file_size / 2 ))
110 file_count=$(( $file_count + 1 ))
115 # _test_full_fs_punch()
117 # This function will test that a hole may be punched
118 # even when the file system is full. Reserved blocks
119 # should be used to allow a punch hole to proceed even
120 # when there is not enough blocks to further fragment the
121 # file. To test this, this function will fragment the file
122 # system by punching holes in regular intervals and filling
123 # the file system between punches.
125 _test_full_fs_punch()
127 local hole_len=$1 # The length of the holes to punch
128 local hole_interval=$2 # The interval between the holes
129 local iterations=$3 # The number of holes to punch
130 local file_name=$4 # File to punch holes in
131 local block_size=$5 # File system block size
132 local file_len=$(( $(( $hole_len + $hole_interval )) * $iterations ))
133 local path=`dirname $file_name`
138 echo "USAGE: _test_full_fs_punch hole_len hole_interval iterations file_name block_size"
142 rm -f $file_name &> /dev/null
144 $XFS_IO_PROG -F -f -c "pwrite 0 $file_len" \
145 -c "fsync" $file_name &> /dev/null
148 _fill_fs $(( 1024 * 1024 * 1024 )) $path/fill $block_size
150 for (( i=0; i<$iterations; i++ ))
152 # This part must not be done as root in order to
153 # test that reserved blocks are used when needed
154 _user_do "$XFS_IO_PROG -F -f -c \"fpunch $hole_offset $hole_len\" $file_name"
156 if [ $? -ne 0 ] ; then
157 echo Punch hole failed
161 hole_offset=$(( $hole_offset + $hole_len + $hole_interval ))
163 _fill_fs $hole_len $path/fill.$i $block_size
168 # Make a small file system to fill
169 umount $SCRATCH_DEV &> /dev/null
170 _scratch_mkfs_sized $(( 1024 * 1024 * 1024 )) &> /dev/null
172 # Test must be able to write files with non-root permissions
173 chmod 777 $SCRATCH_MNT
175 block_size=`stat -f $SCRATCH_DEV | grep "Block size" | cut -d " " -f3`
176 _test_full_fs_punch $(( $block_size * 2 )) $block_size 500 $SCRATCH_MNT/252.$$ $block_size