From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([222.73.24.84]:59608 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754636AbcINBzp (ORCPT ); Tue, 13 Sep 2016 21:55:45 -0400 From: Qu Wenruo Subject: [PATCH v6 4/6] fstests: btrfs: Add basic test for btrfs in-band de-duplication Date: Wed, 14 Sep 2016 09:55:25 +0800 Message-Id: <20160914015527.10274-5-quwenruo@cn.fujitsu.com> In-Reply-To: <20160914015527.10274-1-quwenruo@cn.fujitsu.com> References: <20160914015527.10274-1-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 Sender: fstests-owner@vger.kernel.org To: linux-btrfs@vger.kernel.org, fstests@vger.kernel.org Cc: fdmanana@gmail.com, mfasheh@suse.de List-ID: Add basic test for btrfs in-band de-duplication(inmemory backend), including: 1) Enable 3) Dedup rate 4) File correctness 5) Disable Signed-off-by: Qu Wenruo --- common/defrag | 13 ++++++ tests/btrfs/200 | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/200.out | 22 ++++++++++ tests/btrfs/group | 1 + 4 files changed, 152 insertions(+) create mode 100755 tests/btrfs/200 create mode 100644 tests/btrfs/200.out diff --git a/common/defrag b/common/defrag index 986b4bf..73c7a99 100644 --- a/common/defrag +++ b/common/defrag @@ -59,6 +59,19 @@ _extent_count() $XFS_IO_PROG -c "fiemap" $1 | tail -n +2 | grep -v hole | wc -l| $AWK_PROG '{print $1}' } +# Get the number of unique file extents +# Unique file extents means they have different ondisk bytenr +# Some filesystem supports reflinkat() or in-band de-dup can create +# a file whose all file extents points to the same ondisk bytenr +# this can be used to test if such reflinkat() or in-band de-dup works +_extent_count_uniq() +{ + file=$1 + $XFS_IO_PROG -c "fiemap" $file >> $seqres.full 2>&1 + $XFS_IO_PROG -c "fiemap" $file | tail -n +2 | grep -v hole |\ + $AWK_PROG '{print $3}' | sort | uniq | wc -l +} + _check_extent_count() { min=$1 diff --git a/tests/btrfs/200 b/tests/btrfs/200 new file mode 100755 index 0000000..5a190dd --- /dev/null +++ b/tests/btrfs/200 @@ -0,0 +1,116 @@ +#! /bin/bash +# FS QA Test 200 +# +# Basic btrfs inband dedupe test for inmemory backend +# +#----------------------------------------------------------------------- +# Copyright (c) 2016 Fujitsu. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/defrag + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +_supported_fs btrfs +_supported_os Linux +_require_scratch +_require_btrfs_subcommand dedupe +_require_btrfs_fs_feature dedupe + +# File size is twice the maximum file extent of btrfs +# So even fallbacked to non-dedupe, it will have at least 2 extents +file_size=256m + +_scratch_mkfs >> $seqres.full 2>&1 +_scratch_mount + +do_dedupe_test() +{ + dedupe_bs=$1 + + echo "Testing inmemory dedupe backend with block size $dedupe_bs" + _run_btrfs_util_prog dedupe enable -f -s inmemory -b $dedupe_bs \ + $SCRATCH_MNT + # do sync write to ensure dedupe hash is added into dedupe pool + $XFS_IO_PROG -f -c "pwrite -b $dedupe_bs 0 $dedupe_bs" -c "fsync"\ + $SCRATCH_MNT/initial_block | _filter_xfs_io + + # do sync write to ensure we can get stable fiemap later + $XFS_IO_PROG -f -c "pwrite -b $dedupe_bs 0 $file_size" -c "fsync"\ + $SCRATCH_MNT/real_file | _filter_xfs_io + + # Test if real_file is de-duplicated + nr_uniq_extents=$(_extent_count_uniq $SCRATCH_MNT/real_file) + nr_total_extents=$(_extent_count $SCRATCH_MNT/real_file) + nr_deduped_extents=$(($nr_total_extents - $nr_uniq_extents)) + + echo "deduped/total: $nr_deduped_extents/$nr_total_extents" \ + >> $seqres.full + # Allow a small amount of dedupe miss, as commit interval or + # memory pressure may break a dedupe_bs block and cause + # small extent which won't go through dedupe routine + _within_tolerance "number of deduped extents" $nr_deduped_extents \ + $nr_total_extents 5% -v + + # Also check the md5sum to ensure data is not corrupted + md5=$(_md5_checksum $SCRATCH_MNT/real_file) + echo "md5sum: $md5" +} + +# Test inmemory dedupe first, use 64K dedupe bs to keep compatibility +# with 64K page size +do_dedupe_test 64K + +# Test 128K(default) dedupe bs +do_dedupe_test 128K + +# Test 1M dedupe bs +do_dedupe_test 1M + +# Check dedupe disable +_run_btrfs_util_prog dedupe disable $SCRATCH_MNT + +# success, all done +status=0 +exit +# Check dedupe disable +_run_btrfs_util_prog dedupe disable $SCRATCH_MNT + +# success, all done +status=0 +exit diff --git a/tests/btrfs/200.out b/tests/btrfs/200.out new file mode 100644 index 0000000..e09e573 --- /dev/null +++ b/tests/btrfs/200.out @@ -0,0 +1,22 @@ +QA output created by 200 +Testing inmemory dedupe backend with block size 64K +wrote 65536/65536 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 268435456/268435456 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +number of deduped extents is in range +md5sum: a30e0f3f1b0884081de11d4357811c2e +Testing inmemory dedupe backend with block size 128K +wrote 131072/131072 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 268435456/268435456 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +number of deduped extents is in range +md5sum: a30e0f3f1b0884081de11d4357811c2e +Testing inmemory dedupe backend with block size 1M +wrote 1048576/1048576 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 268435456/268435456 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +number of deduped extents is in range +md5sum: a30e0f3f1b0884081de11d4357811c2e diff --git a/tests/btrfs/group b/tests/btrfs/group index f3a7a4f..ea9c36b 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -133,3 +133,4 @@ 128 auto quick send 129 auto quick send 130 auto clone send +200 auto ib-dedupe -- 2.7.4