Add ENOSPC Hole Punch Test

3/3

 252          |   12 +++++++
 common.punch |   95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+), 0 deletions(-)
index 5efa243..b5204fe 100755
@@ -49,6 +49,7 @@ _supported_os Linux
 
 _require_xfs_io_falloc_punch
 _require_xfs_io_fiemap
+_require_scratch
 
 testfile=$TEST_DIR/252.$$
 

@@ -64,4 +65,15 @@ _test_generic_punch -k falloc fpunch fpunch fiemap _filter_fiemap $testfile -F
 # Delayed allocation multi punch hole tests
 _test_generic_punch -d -k falloc fpunch fpunch fiemap _filter_fiemap $testfile -F
 
+# Test full filesystem hole punching.
+# Make a small file system to fill
+umount $SCRATCH_DEV &> /dev/null
+_scratch_mkfs_sized $(( 1024 * 1024 * 1024 )) &> /dev/null
+_scratch_mount
+# Test must be able to write files with non-root permissions
+chmod 777 $SCRATCH_MNT
+
+block_size=`stat -f $SCRATCH_DEV | grep "Block size" | cut -d " " -f3`
+_test_full_fs_punch $(( $block_size * 2 )) $block_size 500 $SCRATCH_MNT/252.$$
+
 status=0 ; exit

1.7.1


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  252          |   12 +++++++
  common.punch |   95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  2 files changed, 107 insertions(+), 0 deletions(-)
index 5efa243..b5204fe 100755
@@ -49,6 +49,7 @@ _supported_os Linux
 
  _require_xfs_io_falloc_punch
  _require_xfs_io_fiemap
+_require_scratch
 
  testfile=$TEST_DIR/252.$$
 

@@ -64,4 +65,15 @@ _test_generic_punch -k falloc fpunch fpunch fiemap _filter_fiemap $testfile -F
  # Delayed allocation multi punch hole tests
  _test_generic_punch -d -k falloc fpunch fpunch fiemap _filter_fiemap $testfile -F
 
+# Test full filesystem hole punching.
+# Make a small file system to fill
+umount $SCRATCH_DEV&>  /dev/null
+_scratch_mkfs_sized $(( 1024 * 1024 * 1024 ))&>  /dev/null
+_scratch_mount
+# Test must be able to write files with non-root permissions
+chmod 777 $SCRATCH_MNT
+
+block_size=`stat -f $SCRATCH_DEV | grep "Block size" | cut -d " " -f3`
+_test_full_fs_punch $(( $block_size * 2 )) $block_size 500 $SCRATCH_MNT/252.$$
+
  status=0 ; exit

index ddf63b0..fc6123c 100644
@@ -481,5 +481,100 @@ _test_generic_punch()
  		-c "$zero_cmd 128 128" \
  		-c "$map_cmd -v" $testfile | $filter_cmd
  	[ $? -ne 0 ]&&  die_now
+}
+
+# _fill_fs()
+#
+# Fills a file system by repeatedly creating files in the given folder
+# starting with the given file size.  Files are reduced in size when
+# they can no longer fit untill no more files can be created.
+#
+# This routine is used by _test_full_fs_punch to test that a hole may
+# still be punched when the disk is full by borrowing reserved blocks.
+# All files are created as a non root user to prevent reserved blocks
+# from being consumed.
+#
+_fill_fs() {
+	local file_size=$1
+	local dir=$2
+	local file_count=1
+
+	if [ $# -ne 2 ]
+	then
+	    echo "USAGE: $0 filesize dir"
+	    exit 1
+	fi
+
+	mkdir -p $dir&>  /dev/null
+	if [[ $? != 0 ]] ; then

+		return 0
+	fi
+	chmod 777 $dir
+
+	rc=0
+	while [ $file_size -gt 0 -a $rc == 0 ]
+	do
+		# This part must not be done as root or
+		# reserved blocks will be consumed
+		sudo -u nobody $XFS_IO_PROG -F -f -c "pwrite  0 $file_size" $dir/$file_count.bin&>  /dev/null

+		rc=$?
+
+		# If there was no room to make the file,
+		# and the file size can still be made smaller,
+		# then divide it in half, and keep going
+		if [ $file_size -gt 1 -a $rc != 0 ]
+		then
+			file_size=$(( $file_size / 2 ))
+			rc=0
+		fi
+		file_count=$(( $file_count + 1 ))
+
+	done
+}
 
+# _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()
+{
+	hole_len=$1      # The length of the holes to punch
+	hole_interval=$2 # The interval between the holes
+	iterations=$3    # The number of holes to punch
+	file_name=$4     # File to punch holes in
+	file_len=$(( $(( $hole_len + $hole_interval )) * $iterations ))
+	path=`dirname $file_name`
+	hole_offset=0
+
+	rm -f $file_name&>  /dev/null
+
+	$XFS_IO_PROG -F -f -c "pwrite 0 $file_len" \
+		-c "fsync" $file_name&>  /dev/null
+	chmod 666 $file_name
+
+	_fill_fs $(( 1024 * 1024 * 1024 )) $path/fill
+
+	for (( i=0; i<$iterations; i++ ))
+	do
+		# This part must not be done as root in order to
+		# test that reserved blocks are used when needed
+		sudo -u nobody $XFS_IO_PROG -F -f -c "fpunch $hole_offset $hole_len" $file_name
+		rc=$?
+		if [[ $? != 0 ]] ; then
+			echo Punch hole failed

+			break
+		fi
+
+		hole_offset=$(( $hole_offset + $hole_len + $hole_interval ))
+
+		_fill_fs $hole_len $path/fill.$i
+
+	done
  }
+


Add ENOSPC Hole Punch Test

Allison Henderson

Allison Henderson