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 <[email protected]> --- 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 diff --git a/parse-dev-tree.awk b/parse-dev-tree.awk new file mode 100755 index 000000000000..52f9c0aadc25 --- /dev/null +++ b/parse-dev-tree.awk @@ -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) + } +} + diff --git a/parse-extent-tree.awk b/parse-extent-tree.awk new file mode 100755 index 000000000000..01c61254cfef --- /dev/null +++ b/parse-extent-tree.awk @@ -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() +} diff --git a/tests/shared/298 b/tests/shared/298 index e7b7b233de45..846971be327e 100755 --- a/tests/shared/298 +++ b/tests/shared/298 @@ -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 -- 2.7.4
