| #! /bin/bash |
| # FS QA Test No. 256 |
| # |
| # Test Full File System Hole Punching |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2011 IBM Corporation. All Rights Reserved. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| # |
| #----------------------------------------------------------------------- |
| # |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| |
| _cleanup() |
| { |
| rm -f $tmp.* |
| } |
| |
| trap "_cleanup ; exit \$status" 0 1 2 3 15 |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/populate |
| . ./common/filter |
| . ./common/punch |
| |
| # real QA test starts here |
| _supported_fs generic |
| _supported_os Linux |
| |
| _require_xfs_io_command "fpunch" |
| _require_scratch |
| _require_user |
| _require_test |
| |
| testfile=$TEST_DIR/256.$$ |
| |
| # _test_full_fs_punch() |
| # |
| # This function will test that a hole may be punched |
| # even when the file system is full. Reserved blocks |
| # should be used to allow a punch hole to proceed even |
| # when there is not enough blocks to further fragment the |
| # file. To test this, this function will fragment the file |
| # system by punching holes in regular intervals and filling |
| # the file system between punches. |
| # |
| _test_full_fs_punch() |
| { |
| local hole_len=$1 # The length of the holes to punch |
| local hole_interval=$2 # The interval between the holes |
| local iterations=$3 # The number of holes to punch |
| local file_name=$4 # File to punch holes in |
| local block_size=$5 # File system block size |
| local file_len=$(( $(( $hole_len + $hole_interval )) * $iterations )) |
| local path=`dirname $file_name` |
| local hole_offset=0 |
| |
| if [ $# -ne 5 ] |
| then |
| echo "USAGE: _test_full_fs_punch hole_len hole_interval iterations file_name block_size" |
| exit 1 |
| fi |
| |
| rm -f $file_name &> /dev/null |
| |
| $XFS_IO_PROG -f -c "pwrite 0 $file_len" \ |
| -c "fsync" $file_name &> /dev/null |
| chmod 666 $file_name |
| |
| # All files are created as a non root user to prevent reserved blocks |
| # from being consumed. |
| _fill_fs $(( 1024 * 1024 * 1024 )) $path/fill $block_size 1 \ |
| > /dev/null 2>&1 |
| |
| for (( i=0; i<$iterations; i++ )) |
| do |
| # This part must not be done as root in order to |
| # test that reserved blocks are used when needed |
| _user_do "$XFS_IO_PROG -f -c \"fpunch $hole_offset $hole_len\" $file_name" |
| rc=$? |
| if [ $? -ne 0 ] ; then |
| echo Punch hole failed |
| break |
| fi |
| |
| hole_offset=$(( $hole_offset + $hole_len + $hole_interval )) |
| |
| _fill_fs $hole_len $path/fill.$i $block_size 1 > /dev/null 2>&1 |
| |
| done |
| } |
| |
| # Make a small file system to fill |
| _scratch_unmount &> /dev/null |
| _scratch_mkfs_sized $(( 1536 * 1024 * 1024 )) &> /dev/null |
| _scratch_mount |
| # Test must be able to write files with non-root permissions |
| chmod 777 $SCRATCH_MNT |
| |
| block_size=`_get_block_size $SCRATCH_MNT` |
| _test_full_fs_punch $(( $block_size * 2 )) $block_size 500 $SCRATCH_MNT/252.$$ $block_size |
| |
| status=0 ; exit |