new file mode 100755
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2019 Nikolay Borisov, SUSE LLC. All Rights Reserved.
+#
+# Parses btrfs' device tree for holes, required parameters passed on command
+# line:
+# * spb - how many bytes per sector, this is used so that the numbers
+# returned by the script are in sectors.
+# * devsize - size of the device in bytes, used to output the final
+# hole (if any)
+
+function get_extent_size(line, tmp) {
+ split(line, tmp)
+ return tmp[6]
+}
+
+function get_extent_offset(line, tmp) {
+ split(line, tmp)
+ gsub(/\)/,"", tmp[6])
+ return tmp[6]
+}
+
+BEGIN {
+ dev_extent_match="^.item [0-9]* key \\([0-9]* DEV_EXTENT [0-9]*\\).*"
+ dev_extent_len_match="^\\s*chunk_objectid [0-9]* chunk_offset [0-9]* length [0-9]*$"
+}
+
+{
+ if (match($0,dev_extent_match)) {
+ extent_offset = get_extent_offset($0)
+ if (prev_extent_end) {
+ hole_size = extent_offset - prev_extent_end
+ if (hole_size > 0) {
+ print prev_extent_end / spb, int((extent_offset - 1) / spb)
+ }
+ }
+ } else if (match($0, dev_extent_len_match)) {
+ extent_size = get_extent_size($0)
+ prev_extent_end = extent_offset + extent_size
+ }
+}
+
+END {
+ if (prev_extent_end) {
+ print prev_extent_end / spb, int((devsize - 1) / spb)
+ }
+}
+
new file mode 100755
@@ -0,0 +1,125 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2019 Nikolay Borisov, SUSE LLC. All Rights Reserved.
+#
+# Parses btrfs' extent tree for holes, required parameters passed on command
+# line:
+# * spb - how many bytes per sector, this is used so that the numbers
+# returned by the script are in sectors.
+# * nodesize - size of metadata extents, used for internal calculations
+
+function get_extent_size(line, tmp) {
+ if (line ~ data_match || line ~ bg_match) {
+ split(line, tmp)
+ gsub(/\)/,"", tmp[6])
+ return tmp[6]
+ } else if (line ~ metadata_match) {
+ return nodesize
+ }
+}
+
+function get_extent_offset(line, tmp) {
+ split(line, tmp)
+ gsub(/\(/,"",tmp[4])
+ return tmp[4]
+}
+
+function print_array( base_offset, bg_line)
+{
+ if (match(lines[0], bg_match)) {
+ #we don't have an extent at the beginning of of blockgroup, so we
+ #have a hole between blockgroup offset and first extent offset
+ bg_line = lines[0]
+ prev_size=0
+ prev_offset=get_extent_offset(bg_line)
+ delete lines[0]
+ } else {
+ #we have an extent at the beginning of block group, so initialize
+ #the prev_* vars correctly
+ bg_line = lines[1]
+ prev_size = get_extent_size(lines[0])
+ prev_offset = get_extent_offset(lines[0])
+ delete lines[1]
+ delete lines[0]
+ }
+
+ bg_offset=get_extent_offset(bg_line)
+ bgend=bg_offset + get_extent_size(bg_line)
+
+ for (i in lines) {
+ cur_size = get_extent_size(lines[i])
+ cur_offset = get_extent_offset(lines[i])
+ if (cur_offset != prev_offset + prev_size)
+ print int((prev_size + prev_offset) / spb), int((cur_offset-1) / spb)
+ prev_size = cur_size
+ prev_offset = cur_offset
+ }
+
+ print int((prev_size + prev_offset) / spb), int((bgend-1) / spb)
+ total_printed++
+ delete lines
+}
+
+BEGIN {
+ loi_match="^.item [0-9]* key \\([0-9]* (BLOCK_GROUP_ITEM|METADATA_ITEM|EXTENT_ITEM) [0-9]*\\).*"
+ metadata_match="^.item [0-9]* key \\([0-9]* METADATA_ITEM [0-9]*\\).*"
+ data_match="^.item [0-9]* key \\([0-9]* EXTENT_ITEM [0-9]*\\).*"
+ bg_match="^.item [0-9]* key \\([0-9]* BLOCK_GROUP_ITEM [0-9]*\\).*"
+ node_match="^node.*$"
+ leaf_match="^leaf [0-9]* flags"
+ line_count=0
+ total_printed=0
+ skip_lines=0
+}
+
+{
+ #skip lines not belonging to a leaf
+ if (match($0,node_match)) {
+ skip_lines=1
+ } else if (match($0, leaf_match)) {
+ skip_lines=0
+ }
+
+ if (!match($0,loi_match) || skip_lines == 1) next;
+
+ #we have a line of interest, we need to parse it. First check if there is
+ #anything in the array
+ if (line_count==0) {
+ lines[line_count++]=$0;
+ } else {
+ prev_line=lines[line_count-1]
+ split(prev_line, prev_line_fields)
+ prev_objectid=prev_line_fields[4]
+ objectid=$4
+
+ if (objectid == prev_objectid && match($0, bg_match)) {
+ if (total_printed>0) {
+ #We are adding a BG after we have added its first extent
+ #previously, consider this a record ending event and just print
+ #the array
+
+ delete lines[line_count-1]
+ print_array()
+ #we now start a new array with current and previous lines
+ line_count=0
+ lines[line_count++]=prev_line
+ lines[line_count++]=$0
+ } else {
+ #first 2 added lines are EXTENT and BG that match, in this case
+ #just add them
+ lines[line_count++]=$0
+
+ }
+ } else if (match($0, bg_match)) {
+ #ordinary end of record
+ print_array()
+ line_count=0
+ lines[line_count++]=$0
+ } else {
+ lines[line_count++]=$0
+ }
+ }
+}
+
+END {
+ print_array()
+}
@@ -15,14 +15,24 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
. ./common/rc
-_supported_fs ext4 xfs
+_supported_fs ext4 xfs btrfs
_supported_os Linux
_require_test
_require_loop
_require_fstrim
_require_xfs_io_command "fiemap"
-_require_fs_space $TEST_DIR 307200
+if [ "$FSTYP" = "btrfs" ]; then
+ # 3g for btrfs to have distinct bgs
+ _require_fs_space $TEST_DIR 3145728
+ fssize=3000
+else
+ _require_fs_space $TEST_DIR 307200
+ fssize=300
+fi
+
[ "$FSTYP" = "ext4" ] && _require_dumpe2fs
+[ "$FSTYP" = "btrfs" ] && _require_btrfs_command inspect-internal dump-super
+[ "$FSTYP" = "btrfs" ] && _require_btrfs_command inspect-internal dump-tree
_cleanup()
{
@@ -61,6 +71,25 @@ get_free_sectors()
$AWK_PROG -v spb=$sectors_per_block -v agsize=$agsize \
'{ print spb * ($1 * agsize + $2), spb * ($1 * agsize + $2 + $3) - 1 }'
;;
+ btrfs)
+ local device_size=$($BTRFS_UTIL_PROG filesystem show --raw $loop_mnt 2>&1 \
+ | sed -n "s/^.*size \([0-9]*\).*$/\1/p")
+
+ local nodesize=$($BTRFS_UTIL_PROG inspect-internal dump-super $img_file \
+ | sed -n 's/nodesize\s*\(.*\)/\1/p')
+
+ # Get holes within block groups
+ local btrfs_free=$($BTRFS_UTIL_PROG inspect-internal dump-tree -t extent $img_file \
+ | $AWK_PROG -v spb=512 -v nodesize=$nodesize -f parse-extent-tree.awk)
+
+ btrfs_free+="\n"
+
+ # Get holes within unallocated space on disk
+ btrfs_free+=$($BTRFS_UTIL_PROG inspect-internal dump-tree -t dev $img_file \
+ | $AWK_PROG -v spb=512 -v devsize=$device_size -f parse-dev-tree.awk)
+
+ echo -e "$btrfs_free"
+ ;;
esac
}
@@ -105,7 +134,7 @@ here=`pwd`
tmp=`mktemp -d`
img_file=$TEST_DIR/$$.fs
-dd if=/dev/zero of=$img_file bs=1M count=300 &> /dev/null
+dd if=/dev/zero of=$img_file bs=1M count=$fssize &> /dev/null
loop_dev=$(_create_loop_device $img_file)
loop_mnt=$tmp/loop_mnt
@@ -118,6 +147,7 @@ merged_sectors="$tmp/merged_free_sectors"
mkdir $loop_mnt
[ "$FSTYP" = "xfs" ] && MKFS_OPTIONS="-f $MKFS_OPTIONS"
+[ "$FSTYP" = "btrfs" ] && MKFS_OPTIONS="-f -dsingle -msingle"
_mkfs_dev $loop_dev
_mount $loop_dev $loop_mnt
Add support for btrfs in shared/298. Achieve this by introducing 2 new awk scripts that parse relevant btrfs structures and print holes. Additionally modify the test to create larger - 3gb filesystem in the case of btrfs. This is needed so that distinct block groups are used for data and metadata. Signed-off-by: Nikolay Borisov <nborisov@suse.com> --- parse-dev-tree.awk | 47 +++++++++++++++++++ parse-extent-tree.awk | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++ tests/shared/298 | 36 +++++++++++++-- 3 files changed, 205 insertions(+), 3 deletions(-) create mode 100755 parse-dev-tree.awk create mode 100755 parse-extent-tree.awk