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

[Koen De Wit <koen.de.wit@oracle.com>]

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