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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 <koen.de.wit@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Koen De Wit
committed by
Dave Chinner
Dave Chinner
parent
a050cb00c7
commit
c8d9f19638
@@ -2102,6 +2102,27 @@ _require_ugid_map()
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fi
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}
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_require_cp_reflink()
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{
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cp --help | grep -q reflink || \
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_notrun "This test requires a cp with --reflink support."
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}
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# Given 2 files, verify that they have the same mapping but different
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# inodes - i.e. an undisturbed reflink
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# Silent if so, make noise if not
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_verify_reflink()
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{
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# not a hard link or symlink?
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cmp -s <(stat -c '%i' $1) <(stat -c '%i' $2) \
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&& echo "$1 and $2 are not reflinks: same inode number"
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# same mapping?
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diff -u <($XFS_IO_PROG -c "fiemap" $1 | grep -v $1) \
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<($XFS_IO_PROG -c "fiemap" $2 | grep -v $2) \
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|| echo "$1 and $2 are not reflinks: different extents"
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}
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_create_loop_device()
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{
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file=$1
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@@ -0,0 +1,90 @@
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#! /bin/bash
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# FS QA Test No. 026
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#
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# Tests file clone functionality of btrfs ("reflinks"):
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# - Reflink a file
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# - Reflink the reflinked file
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# - Modify the original file
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# - Modify the reflinked file
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2014, Oracle and/or its affiliates. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. common/rc
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. common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_xfs_io_fiemap
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_require_cp_reflink
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TESTDIR1=$TEST_DIR/test-$seq
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rm -rf $TESTDIR1
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mkdir $TESTDIR1
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_checksum_files() {
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for F in original copy1 copy2
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do
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md5sum $TESTDIR1/$F | _filter_test_dir
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done
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}
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rm -f $seqres.full
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echo "Create the original file and reflink to copy1, copy2"
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$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 9000' $TESTDIR1/original \
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>> $seqres.full 2>&1
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cp --reflink $TESTDIR1/original $TESTDIR1/copy1
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cp --reflink $TESTDIR1/copy1 $TESTDIR1/copy2
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_verify_reflink $TESTDIR1/original $TESTDIR1/copy1
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_verify_reflink $TESTDIR1/original $TESTDIR1/copy2
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echo "Original md5sums:"
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_checksum_files
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echo "Overwrite original file with new data"
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$XFS_IO_PROG -c 'pwrite -S 0x62 0 9000' $TESTDIR1/original \
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>> $seqres.full 2>&1
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echo "md5sums after overwriting original:"
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_checksum_files
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echo "Overwrite copy1 with different new data"
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$XFS_IO_PROG -c 'pwrite -S 0x63 0 9000' $TESTDIR1/copy1 \
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>> $seqres.full 2>&1
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echo "md5sums after overwriting copy1:"
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_checksum_files
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# success, all done
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status=0
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exit
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@@ -0,0 +1,16 @@
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QA output created by 026
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Create the original file and reflink to copy1, copy2
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Original md5sums:
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/original
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy1
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2
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Overwrite original file with new data
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md5sums after overwriting original:
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4a847a25439532bf48b68c9e9536ed5b TEST_DIR/test-026/original
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy1
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2
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Overwrite copy1 with different new data
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md5sums after overwriting copy1:
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4a847a25439532bf48b68c9e9536ed5b TEST_DIR/test-026/original
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e271cd47d9f62ebc96cb4e67ae4d16db TEST_DIR/test-026/copy1
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42d69d1a6d333a7ebdf64792a555e392 TEST_DIR/test-026/copy2
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@@ -28,3 +28,4 @@
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023 auto
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024 auto quick
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025 auto quick
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026 auto quick
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