btrfs: add regression test for incremental send

Test for a btrfs incremental send issue where we end up sending a
wrong section of data from a file extent if the corresponding file
extent is compressed and the respective file extent item has a non
zero data offset.

Fixed by the following linux kernel btrfs patch:

   Btrfs: use right clone root offset for compressed extents

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/common/rc b/common/rc
index e91568b07a70cc058520f4c01e9b5a3069360666..27be009e728762608c944c00e0d24388b0344188 100644 (file)
--- a/common/rc
+++ b/common/rc
@@ -2207,6 +2207,11 @@ run_check()
        "$@" >> $seqres.full 2>&1 || _fail "failed: '$@'"
 }
 
+_run_btrfs_util_prog()
+{
+       run_check $BTRFS_UTIL_PROG $*
+}
+
 init_rc()
 {
        if [ "$iam" == new ]

diff --git a/tests/btrfs/038 b/tests/btrfs/038
new file mode 100755 (executable)
index 0000000..8893696
--- /dev/null
+++ b/tests/btrfs/038
@@ -0,0 +1,119 @@
+#! /bin/bash
+# FS QA Test No. btrfs/038
+#
+# Test for a btrfs incremental send issue where we end up sending a
+# wrong section of data from a file extent if the corresponding file
+# extent is compressed and the respective file extent item has a non
+# zero data offset.
+#
+# Fixed by the following linux kernel btrfs patch:
+#
+#   Btrfs: use right clone root offset for compressed extents
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Filipe Manana.  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=`mktemp -d`
+status=1       # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    rm -fr $tmp
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+_need_to_be_root
+
+FSSUM_PROG=$here/src/fssum
+[ -x $FSSUM_PROG ] || _notrun "fssum not built"
+
+rm -f $seqres.full
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount "-o compress-force=lzo"
+
+$XFS_IO_PROG -f -c "truncate 118811" $SCRATCH_MNT/foo
+$XFS_IO_PROG -c "pwrite -S 0x0d -b 39987 92267 39987" \
+       $SCRATCH_MNT/foo | _filter_xfs_io
+
+_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \
+       $SCRATCH_MNT/mysnap1
+
+$XFS_IO_PROG -c "pwrite -S 0x3e -b 80000 200000 80000" \
+       $SCRATCH_MNT/foo | _filter_xfs_io
+
+# Sync to avoid btrfs merging file extent items, which would make the test
+# succeed when it should fail.
+_run_btrfs_util_prog filesystem sync $SCRATCH_MNT
+
+$XFS_IO_PROG -c "pwrite -S 0xdc -b 10000 250000 10000" \
+       $SCRATCH_MNT/foo | _filter_xfs_io
+$XFS_IO_PROG -c "pwrite -S 0xff -b 10000 300000 10000" \
+       $SCRATCH_MNT/foo | _filter_xfs_io
+
+# will be used for incremental send to be able to issue clone operations
+_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \
+       $SCRATCH_MNT/clones_snap
+
+_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \
+       $SCRATCH_MNT/mysnap2
+
+run_check $FSSUM_PROG -A -f -w $tmp/1.fssum $SCRATCH_MNT/mysnap1
+run_check $FSSUM_PROG -A -f -w $tmp/2.fssum -x $SCRATCH_MNT/mysnap2/mysnap1 \
+       -x $SCRATCH_MNT/mysnap2/clones_snap $SCRATCH_MNT/mysnap2
+run_check $FSSUM_PROG -A -f -w $tmp/clones.fssum $SCRATCH_MNT/clones_snap \
+       -x $SCRATCH_MNT/clones_snap/mysnap1 -x $SCRATCH_MNT/clones_snap/mysnap2
+
+_run_btrfs_util_prog send $SCRATCH_MNT/mysnap1 -f $tmp/1.snap
+_run_btrfs_util_prog send $SCRATCH_MNT/clones_snap -f $tmp/clones.snap
+_run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 \
+       -c $SCRATCH_MNT/clones_snap $SCRATCH_MNT/mysnap2 -f $tmp/2.snap
+
+_scratch_unmount
+_check_btrfs_filesystem $SCRATCH_DEV
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+_run_btrfs_util_prog receive $SCRATCH_MNT -f $tmp/1.snap
+run_check $FSSUM_PROG -r $tmp/1.fssum $SCRATCH_MNT/mysnap1 2>> $seqres.full
+
+_run_btrfs_util_prog receive $SCRATCH_MNT -f $tmp/clones.snap
+run_check $FSSUM_PROG -r $tmp/clones.fssum $SCRATCH_MNT/clones_snap 2>> $seqres.full
+
+_run_btrfs_util_prog receive $SCRATCH_MNT -f $tmp/2.snap
+run_check $FSSUM_PROG -r $tmp/2.fssum $SCRATCH_MNT/mysnap2 2>> $seqres.full
+
+_scratch_unmount
+_check_btrfs_filesystem $SCRATCH_DEV
+
+status=0
+exit

diff --git a/tests/btrfs/038.out b/tests/btrfs/038.out
new file mode 100644 (file)
index 0000000..7be3156
--- /dev/null
+++ b/tests/btrfs/038.out
@@ -0,0 +1,9 @@
+QA output created by 038
+wrote 39987/39987 bytes at offset 92267
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 80000/80000 bytes at offset 200000
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 10000/10000 bytes at offset 250000
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 10000/10000 bytes at offset 300000
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

diff --git a/tests/btrfs/group b/tests/btrfs/group
index 22c34fca1950dae8b0dff626305280d785e94a01..ceba8ec1600fabfc8ff532d3a20f88e091a07025 100644 (file)
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -40,3 +40,4 @@
 035 auto quick
 036 auto quick
 037 auto quick
+038 auto quick