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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2011 IBM Corporation. All Rights Reserved.
#
# FS QA Test No. 256
#
# Test Full File System Hole Punching
#
. ./common/preamble
_begin_fstest auto quick punch
# Import common functions.
. ./common/populate
. ./common/filter
. ./common/punch
# real QA test starts here
_supported_fs generic
_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
local start_time
local stop_time
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
start_time="$(date +%s)"
stop_time=$(( start_time + (30 * TIME_FACTOR) ))
# 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
test "$(date +%s)" -ge "$stop_time" && break
# 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
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