From 7927c5c94c51d30947824832bc066079155144de Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 24 Feb 2017 17:12:57 -0800 Subject: [PATCH] reflink: test adjacency of reflinked blocks If we reflink a file with N blocks to another file one block at a time, does the destination file end up with the same number of extents as the source file? In other words, does the filesystem succeed at combining adjacent mappings into a maximal extents? Signed-off-by: Darrick J. Wong Reviewed-by: Eryu Guan Signed-off-by: Eryu Guan --- tests/generic/414 | 106 ++++++++++++++++++++++++++++++++++++++++++ tests/generic/414.out | 11 +++++ tests/generic/group | 1 + 3 files changed, 118 insertions(+) create mode 100755 tests/generic/414 create mode 100644 tests/generic/414.out diff --git a/tests/generic/414 b/tests/generic/414 new file mode 100755 index 00000000..ee85d73b --- /dev/null +++ b/tests/generic/414 @@ -0,0 +1,106 @@ +#! /bin/bash +# FS QA Test No. 414 +# +# Check that reflinking adjacent blocks in a file produces a single +# block mapping extent. +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Oracle, Inc. 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 7 15 + +_cleanup() +{ + cd / + rm -rf $tmp.* + wait +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/reflink + +# real QA test starts here +_supported_os Linux +_supported_fs generic +_require_scratch_reflink +_require_fiemap + +echo "Format and mount" +_scratch_mkfs > $seqres.full 2>&1 +_scratch_mount >> $seqres.full 2>&1 + +testdir=$SCRATCH_MNT/test-$seq +mkdir $testdir + +blocks=32 +blksz=65536 +sz=$((blocks * blksz)) + +echo "Create the original files" +$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file1 >> $seqres.full +_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full +seq 0 $blksz $((sz - blksz)) | while read offset; do + _reflink_range $testdir/file1 $offset $testdir/file2 $offset $blksz >> $seqres.full +done + +echo "Compare files" +md5sum $testdir/file1 | _filter_scratch +md5sum $testdir/file2 | _filter_scratch + +echo "Check extent counts" +f1=$(_count_extents $testdir/file1) +f2=$(_count_extents $testdir/file2) +s1=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file1 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$') +s2=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file2 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$') + +# Did the fs combine the extent mappings when we made f2? +test $f1 -eq $f2 || echo "f1 ($f1) != f2 ($f2)" +test $s1 -eq $s2 || echo "s1 ($s1) != s2 ($s2)" +test $f1 -eq $s1 || echo "f1 ($f1) != s1 ($f1)" +test $f2 -eq $s2 || echo "f2 ($f2) != s2 ($f2)" + +_scratch_cycle_mount + +echo "Compare files after remounting" +md5sum $testdir/file1 | _filter_scratch +md5sum $testdir/file2 | _filter_scratch + +echo "Check extent counts" +f1=$(_count_extents $testdir/file1) +f2=$(_count_extents $testdir/file2) +s1=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file1 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$') +s2=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file2 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$') + +# Are the mappings still combined? +test $f1 -eq $f2 || echo "f1 ($f1) != f2 ($f2)" +test $s1 -eq $s2 || echo "s1 ($s1) != s2 ($s2)" +test $f1 -eq $s1 || echo "f1 ($f1) != s1 ($f1)" +test $f2 -eq $s2 || echo "f2 ($f2) != s2 ($f2)" + +# success, all done +status=0 +exit diff --git a/tests/generic/414.out b/tests/generic/414.out new file mode 100644 index 00000000..a142347e --- /dev/null +++ b/tests/generic/414.out @@ -0,0 +1,11 @@ +QA output created by 414 +Format and mount +Create the original files +Compare files +de89461b64701958984c95d1bfb0065a SCRATCH_MNT/test-414/file1 +de89461b64701958984c95d1bfb0065a SCRATCH_MNT/test-414/file2 +Check extent counts +Compare files after remounting +de89461b64701958984c95d1bfb0065a SCRATCH_MNT/test-414/file1 +de89461b64701958984c95d1bfb0065a SCRATCH_MNT/test-414/file2 +Check extent counts diff --git a/tests/generic/group b/tests/generic/group index bd358d52..ba661c7f 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -416,3 +416,4 @@ 411 auto quick mount 412 auto quick metadata 413 auto quick +414 auto quick clone -- 2.39.5