From c8d9f1963807018b1c65fbbc9c1f01931114914b Mon Sep 17 00:00:00 2001 From: Koen De Wit Date: Mon, 20 Jan 2014 13:56:34 +1100 Subject: [PATCH] btrfs: simple sparse copy testcase for btrfs Tests file clone functionality of btrfs ("reflinks"): - Reflink a file - Reflink the reflinked file - Modify the original file - Modify the reflinked file [sandeen: add helpers, make several mostly-cosmetic changes to the original testcase] Signed-off-by: Koen De Wit Signed-off-by: Eric Sandeen Signed-off-by: Dave Chinner --- common/rc | 21 +++++++++++ tests/btrfs/026 | 90 +++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/026.out | 16 ++++++++ tests/btrfs/group | 1 + 4 files changed, 128 insertions(+) create mode 100644 tests/btrfs/026 create mode 100644 tests/btrfs/026.out diff --git a/common/rc b/common/rc index a8c93e1b..68dc9a02 100644 --- a/common/rc +++ b/common/rc @@ -2102,6 +2102,27 @@ _require_ugid_map() fi } +_require_cp_reflink() +{ + cp --help | grep -q reflink || \ + _notrun "This test requires a cp with --reflink support." +} + +# Given 2 files, verify that they have the same mapping but different +# inodes - i.e. an undisturbed reflink +# Silent if so, make noise if not +_verify_reflink() +{ + # not a hard link or symlink? + cmp -s <(stat -c '%i' $1) <(stat -c '%i' $2) \ + && echo "$1 and $2 are not reflinks: same inode number" + + # same mapping? + diff -u <($XFS_IO_PROG -c "fiemap" $1 | grep -v $1) \ + <($XFS_IO_PROG -c "fiemap" $2 | grep -v $2) \ + || echo "$1 and $2 are not reflinks: different extents" +} + _create_loop_device() { file=$1 diff --git a/tests/btrfs/026 b/tests/btrfs/026 new file mode 100644 index 00000000..bf6f5284 --- /dev/null +++ b/tests/btrfs/026 @@ -0,0 +1,90 @@ +#! /bin/bash +# FS QA Test No. 026 +# +# Tests file clone functionality of btrfs ("reflinks"): +# - Reflink a file +# - Reflink the reflinked file +# - Modify the original file +# - Modify the reflinked file +# +#----------------------------------------------------------------------- +# Copyright (c) 2014, Oracle and/or its affiliates. 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` +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 $tmp.* +} + +# get standard environment, filters and checks +. common/rc +. common/filter + +# real QA test starts here +_supported_fs btrfs +_supported_os Linux + +_require_xfs_io_fiemap +_require_cp_reflink + +TESTDIR1=$TEST_DIR/test-$seq +rm -rf $TESTDIR1 +mkdir $TESTDIR1 + +_checksum_files() { + for F in original copy1 copy2 + do + md5sum $TESTDIR1/$F | _filter_test_dir + done +} + +rm -f $seqres.full + +echo "Create the original file and reflink to copy1, copy2" +$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 9000' $TESTDIR1/original \ + >> $seqres.full 2>&1 +cp --reflink $TESTDIR1/original $TESTDIR1/copy1 +cp --reflink $TESTDIR1/copy1 $TESTDIR1/copy2 +_verify_reflink $TESTDIR1/original $TESTDIR1/copy1 +_verify_reflink $TESTDIR1/original $TESTDIR1/copy2 +echo "Original md5sums:" +_checksum_files + +echo "Overwrite original file with new data" +$XFS_IO_PROG -c 'pwrite -S 0x62 0 9000' $TESTDIR1/original \ + >> $seqres.full 2>&1 +echo "md5sums after overwriting original:" +_checksum_files + +echo "Overwrite copy1 with different new data" +$XFS_IO_PROG -c 'pwrite -S 0x63 0 9000' $TESTDIR1/copy1 \ + >> $seqres.full 2>&1 +echo "md5sums after overwriting copy1:" +_checksum_files + +# success, all done +status=0 +exit diff --git a/tests/btrfs/026.out b/tests/btrfs/026.out new file mode 100644 index 00000000..3b90ff00 --- /dev/null +++ b/tests/btrfs/026.out @@ -0,0 +1,16 @@ +QA output created by 026 +Create the original file and reflink to copy1, copy2 +Original md5sums: +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/original +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy1 +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2 +Overwrite original file with new data +md5sums after overwriting original: +4a847a25439532bf48b68c9e9536ed5b TEST_DIR/test-026/original +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy1 +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2 +Overwrite copy1 with different new data +md5sums after overwriting copy1: +4a847a25439532bf48b68c9e9536ed5b TEST_DIR/test-026/original +e271cd47d9f62ebc96cb4e67ae4d16db TEST_DIR/test-026/copy1 +42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2 diff --git a/tests/btrfs/group b/tests/btrfs/group index 1a4dad88..b6073b7f 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -28,3 +28,4 @@ 023 auto 024 auto quick 025 auto quick +026 auto quick -- 2.39.5