[PATCH RESEND] xfstests: btrfs: cross-subvolume sparse copy

[PATCH RESEND] xfstests: btrfs: cross-subvolume sparse copy

[Koen De Wit]

This testscript creates reflinks to files on different subvolumes,
overwrites the original files and reflinks, and moves reflinked files
between subvolumes.

Signed-off-by: Koen De Wit <koen.de.wit@oracle.com>
---

Originally submitted as test 302, btrfs/316

diff --git a/tests/btrfs/030 b/tests/btrfs/030
new file mode 100644
index 0000000..5ebc555
--- /dev/null
+++ b/tests/btrfs/030
@@ -0,0 +1,137 @@
+#! /bin/bash
+# FS QA Test No. 030
+#
+# Testing cross-subvolume sparse copy on btrfs
+#    - Create two subvolumes, mount one of them
+#    - Create a file on each (sub/root)volume,
+#      reflink them on the other volumes
+#    - Change one original and two reflinked files
+#    - Move reflinked files between subvolumes
+#
+#-----------------------------------------------------------------------
+# 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()
+{
+    umount $SCRATCH_MNT
+    rm -rf $TESTDIR1
+    rm -rf $TESTDIR2
+    btrfs subvolume delete $SUBVOL1 >> $seqres.full
+    btrfs subvolume delete $SUBVOL2 >> $seqres.full
+    cd /
+    rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+
+_require_scratch
+_require_cp_reflink
+
+_checksum_files() {
+    for F in file1 file2 file3
+    do
+        echo "$F:"
+        for D in $TESTDIR1 $SCRATCH_MNT $SUBVOL2
+        do
+            _md5_checksum $D/$F
+        done
+    done
+}
+
+TESTDIR1=$TEST_DIR/test-$seq-1
+TESTDIR2=$TEST_DIR/test-$seq-2
+SUBVOL1=$TEST_DIR/subvol-$seq-1
+SUBVOL2=$TEST_DIR/subvol-$seq-2
+
+_scratch_unmount 2>/dev/null
+rm -rf $seqres.full
+rm -rf $TESTDIR1 $TESTDIR2
+btrfs subvol delete $SUBVOL1 >/dev/null 2>&1
+btrfs subvol delete $SUBVOL2 >/dev/null 2>&1
+
+mkdir $TESTDIR1
+mkdir $TESTDIR2
+btrfs subvolume create $SUBVOL1 >> $seqres.full
+btrfs subvolume create $SUBVOL2 >> $seqres.full
+_mount -t btrfs -o subvol=subvol-$seq-1 $TEST_DEV $SCRATCH_MNT
+
+echo "Create initial files"
+# TESTDIR1/file1 is very small and will be inlined
+$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 10' $TESTDIR1/file1 \
+    >> $seqres.full
+$XFS_IO_PROG -f -c 'pwrite -S 0x62 0 13000' $SCRATCH_MNT/file2 \
+    >> $seqres.full
+$XFS_IO_PROG -f -c 'pwrite -S 0x63 0 17000' $SUBVOL2/file3 \
+    >> $seqres.full
+
+echo "Create reflinks to the initial files on other subvolumes"
+cp --reflink $TESTDIR1/file1 $SUBVOL1
+cp --reflink $TESTDIR1/file1 $SUBVOL2
+cp --reflink $SUBVOL1/file2 $TESTDIR1/
+cp --reflink $SUBVOL1/file2 $SUBVOL2
+cp --reflink $SUBVOL2/file3 $TESTDIR1/
+cp --reflink $SUBVOL2/file3 $SUBVOL1
+
+echo "Verify the reflinks"
+_verify_reflink $SCRATCH_MNT/file2 $TESTDIR1/file2
+_verify_reflink $SCRATCH_MNT/file2 $SUBVOL2/file2
+_verify_reflink $SUBVOL2/file3 $TESTDIR1/file3
+_verify_reflink $SUBVOL2/file3 $SCRATCH_MNT/file3
+echo "Verify the file contents:"
+_checksum_files
+
+echo -e "---\nOverwrite some files with new content"
+$XFS_IO_PROG -c 'pwrite -S 0x64 0 20' $TESTDIR1/file1 >> $seqres.full
+$XFS_IO_PROG -c 'pwrite -S 0x66 0 21000' $SUBVOL2/file2 >> $seqres.full
+$XFS_IO_PROG -c 'pwrite -S 0x65 5000 5000' $SCRATCH_MNT/file3 \
+    >> $seqres.full
+
+echo -n "Verify that non-overwritten reflinks "
+echo "still have the same data blocks"
+_verify_reflink $TESTDIR1/file2 $SCRATCH_MNT/file2
+_verify_reflink $TESTDIR1/file3 $SUBVOL2/file3
+echo "Verify the file contents:"
+_checksum_files
+
+echo -e "---\nShuffle files between directories"
+mv $TESTDIR1/file* $TESTDIR2
+mv $SCRATCH_MNT/file* $TESTDIR1/
+mv $SUBVOL2/file* $SCRATCH_MNT/
+mv $TESTDIR2/file* $SUBVOL2/
+
+# No _verify_reflink here as data is copied when moving files
+# between subvols
+echo "Verify the file contents:"
+_checksum_files
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/030.out b/tests/btrfs/030.out
new file mode 100644
index 0000000..050ae0b
--- /dev/null
+++ b/tests/btrfs/030.out
@@ -0,0 +1,48 @@
+QA output created by 030
+Create initial files
+Create reflinks to the initial files on other subvolumes
+Verify the reflinks
+Verify the file contents:
+file1:
+e09c80c42fda55f9d992e59ca6b3307d
+e09c80c42fda55f9d992e59ca6b3307d
+e09c80c42fda55f9d992e59ca6b3307d
+file2:
+d7402b46310fbbfbc5e466b1dccb043b
+d7402b46310fbbfbc5e466b1dccb043b
+d7402b46310fbbfbc5e466b1dccb043b
+file3:
+5a95800e4c04b11117aa4e4de057721f
+5a95800e4c04b11117aa4e4de057721f
+5a95800e4c04b11117aa4e4de057721f
+---
+Overwrite some files with new content
+Verify that non-overwritten reflinks still have the same data blocks
+Verify the file contents:
+file1:
+00d620f69f30327f0f8946b95c12de44
+e09c80c42fda55f9d992e59ca6b3307d
+e09c80c42fda55f9d992e59ca6b3307d
+file2:
+d7402b46310fbbfbc5e466b1dccb043b
+d7402b46310fbbfbc5e466b1dccb043b
+917619ae44b38bb9968af261c3c45440
+file3:
+5a95800e4c04b11117aa4e4de057721f
+b9f275cd638cb784c9e61def94c622a8
+5a95800e4c04b11117aa4e4de057721f
+---
+Shuffle files between directories
+Verify the file contents:
+file1:
+e09c80c42fda55f9d992e59ca6b3307d
+e09c80c42fda55f9d992e59ca6b3307d
+00d620f69f30327f0f8946b95c12de44
+file2:
+d7402b46310fbbfbc5e466b1dccb043b
+917619ae44b38bb9968af261c3c45440
+d7402b46310fbbfbc5e466b1dccb043b
+file3:
+b9f275cd638cb784c9e61def94c622a8
+5a95800e4c04b11117aa4e4de057721f
+5a95800e4c04b11117aa4e4de057721f
diff --git a/tests/btrfs/group b/tests/btrfs/group
index 8eb8c4f..3f61799 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -32,3 +32,4 @@
 027 auto quick
 028 auto quick
 029 auto quick
+030 auto quick
-- 
1.7.1

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Re: [PATCH RESEND] xfstests: btrfs: cross-subvolume sparse copy

[David Sterba]

On Tue, Jan 21, 2014 at 12:40:48PM +0100, Koen De Wit wrote:
> +btrfs subvol delete $SUBVOL1 >/dev/null 2>&1
> +btrfs subvol delete $SUBVOL2 >/dev/null 2>&1

Please use $BTRFS_UTIL_PROG instead of 'btrfs' and don't shorten the
command names, ie 'subvolume'.

> +cp --reflink $TESTDIR1/file1 $SUBVOL1
> +cp --reflink $TESTDIR1/file1 $SUBVOL2
> +cp --reflink $SUBVOL1/file2 $TESTDIR1/
> +cp --reflink $SUBVOL1/file2 $SUBVOL2
> +cp --reflink $SUBVOL2/file3 $TESTDIR1/
> +cp --reflink $SUBVOL2/file3 $SUBVOL1

--reflink without any parameter means 'always', that's what we want, but
can we possibly make it explicit? 'cp' is an external tool and if the
default changes, the test would not work as expected.

Otherwise ok,
Reviewed-by: David Sterba <dsterba@suse.cz>

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