| #!/bin/ksh |
| |
| # |
| # This file and its contents are supplied under the terms of the |
| # Common Development and Distribution License ("CDDL"), version 1.0. |
| # You may only use this file in accordance with the terms of version |
| # 1.0 of the CDDL. |
| # |
| # A full copy of the text of the CDDL should have accompanied this |
| # source. A copy of the CDDL is also available via the Internet at |
| # http://www.illumos.org/license/CDDL. |
| # |
| |
| # |
| # Copyright (c) 2020 The FreeBSD Foundation [1] |
| # |
| # [1] Portions of this software were developed by Allan Jude |
| # under sponsorship from the FreeBSD Foundation. |
| |
| . $STF_SUITE/include/libtest.shlib |
| |
| # |
| # Description: |
| # zdb -Z pool <objid> will display the ZSTD compression header |
| # This will contain the actual length of the compressed data, as well as |
| # the version of ZSTD used to compress the block, and the compression level |
| # |
| # Strategy: |
| # 1. Create a pool, set compression to zstd-<random level> |
| # 2. Write some identifiable data to a file |
| # 3. Run zdb -Zddddddbbbbbb against the file |
| # 4. Record the DVA, lsize, and psize, and ZSTD header of L0 block 0 |
| # 5. Check that the ZSTD length is less than psize |
| # 6. Check that the ZSTD level matches the level we requested |
| # 7. Run zdb -R with :dr flags and confirm the size and content match |
| # |
| |
| function cleanup |
| { |
| datasetexists $TESTPOOL && destroy_pool $TESTPOOL |
| } |
| |
| log_assert "Verify zdb -Z (read ZSTD header) works as expected" |
| log_onexit cleanup |
| src_data="$STF_SUITE/tests/functional/cli_root/zfs_receive/zstd_test_data.txt" |
| init_data=$TESTDIR/file1 |
| write_count=128 |
| blksize=131072 |
| verify_runnable "global" |
| verify_disk_count "$DISKS" 2 |
| random_level=$((RANDOM%19 + 1)) |
| |
| default_mirror_setup_noexit $DISKS |
| log_must zfs set recordsize=$blksize $TESTPOOL/$TESTFS |
| log_must zfs set compression=zstd-$random_level $TESTPOOL/$TESTFS |
| |
| # write the 1k of text 128 times |
| for i in {1..$write_count} |
| do |
| cat $src_data >> $init_data |
| done |
| |
| sync_pool $TESTPOOL true |
| |
| # get object number of file |
| listing=$(ls -i $init_data) |
| set -A array $listing |
| obj=${array[0]} |
| log_note "file $init_data has object number $obj" |
| |
| output=$(zdb -Zddddddbbbbbb $TESTPOOL/$TESTFS $obj 2> /dev/null \ |
| |grep -m 1 "L0 DVA" |head -n1) |
| dva=$(sed -Ene 's/^.+DVA\[0\]=<([^>]+)>.*$/\1/p' <<< "$output") |
| log_note "block 0 of $init_data has a DVA of $dva" |
| |
| # use the length reported by zdb -ddddddbbbbbb |
| size_str=$(sed -Ene 's/^.+ size=([^ ]+) .*$/\1/p' <<< "$output") |
| # convert sizes to decimal |
| lsize=$(echo $size_str |awk '{split($0,array,"/")} END{print array[1]}') |
| lsize_orig=$lsize |
| lsize=${lsize%?} |
| lsize_bytes=$((16#$lsize)) |
| psize=$(echo $size_str |awk '{split($0,array,"/")} END{print array[2]}') |
| psize_orig=$psize |
| psize=${psize%?} |
| psize_bytes=$((16#$psize)) |
| log_note "block size $size_str" |
| |
| # Get the ZSTD header reported by zdb -Z |
| zstd_str=$(sed -Ene 's/^.+ ZSTD:size=([^:]+):version=([^:]+):level=([^:]+):.*$/\1:\2:\3/p' <<< "$output") |
| zstd_size=$(echo "$zstd_str" |awk '{split($0,array,":")} END{print array[1]}') |
| log_note "ZSTD compressed size $zstd_size" |
| (( $psize_bytes < $zstd_size )) && log_fail \ |
| "zdb -Z failed: physical block size was less than header content length ($psize_bytes < $zstd_size)" |
| |
| zstd_version=$(echo "$zstd_str" |awk '{split($0,array,":")} END{print array[2]}') |
| log_note "ZSTD version $zstd_version" |
| |
| zstd_level=$(echo "$zstd_str" |awk '{split($0,array,":")} END{print array[3]}') |
| log_note "ZSTD level $zstd_level" |
| (( $zstd_level != $random_level )) && log_fail \ |
| "zdb -Z failed: compression level did not match header level ($zstd_level < $random_level)" |
| |
| vdev=$(echo "$dva" |awk '{split($0,array,":")} END{print array[1]}') |
| offset=$(echo "$dva" |awk '{split($0,array,":")} END{print array[2]}') |
| # Check the first 1024 bytes |
| output=$(ZDB_NO_ZLE="true" zdb -R $TESTPOOL $vdev:$offset:$size_str:dr 2> /dev/null) |
| outsize=$(wc -c <<< "$output") |
| (( $outsize != $blksize )) && log_fail \ |
| "zdb -Z failed to decompress the data to the expected length ($outsize != $lsize_bytes)" |
| cmp $init_data - <<< "$output" |
| (( $? != 0 )) && log_fail "zdb -R :dr failed to decompress the data properly" |
| |
| log_pass "zdb -Z flag (ZSTD compression header) works as expected" |