btrfs: test send issue with non-aligned clone operations

Test for an issue in btrfs send where it sent clone operations to user
space with a range (offset + length) that was not aligned with the block
size. This caused the btrfs receive command to send such clone operations
to the ioctl clone API, which would return -EINVAL errors to btrfs receive,
causing the receive command to abort immediately.

This corresponding btrfs linux kernel patch that fixes this issue is at:

https://patchwork.kernel.org/patch/3470401/

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>

tests/btrfs/025

@@ -0,0 +1,98 @@
+#! /bin/bash
+# FS QA Test No. btrfs/025
+#
+# Test for an issue in btrfs send where it sent clone operations to user
+# space with a range (offset + length) that was not aligned with the block
+# size. This caused the btrfs receive command to send such clone operations
+# to the ioctl clone API, which would return -EINVAL errors to btrfs receive,
+# causing the receive command to abort immediately.
+#
+#-----------------------------------------------------------------------
+# 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"
+
+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
+
+rm -f $seqres.full
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+$XFS_IO_PROG -f -c "truncate 819200" $SCRATCH_MNT/foo | _filter_xfs_io
+$BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch
+
+$XFS_IO_PROG -c "falloc -k 819200 667648" $SCRATCH_MNT/foo | _filter_xfs_io
+$BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch
+
+$XFS_IO_PROG -f -c "pwrite 1482752 2978" $SCRATCH_MNT/foo | _filter_xfs_io
+$BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch
+
+$BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 | \
+    _filter_scratch
+
+$XFS_IO_PROG -f -c "truncate 883305" $SCRATCH_MNT/foo | _filter_xfs_io
+$BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch
+
+$BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 | \
+    _filter_scratch
+
+$BTRFS_UTIL_PROG send $SCRATCH_MNT/mysnap1 -f $tmp/1.snap 2>&1 | _filter_scratch
+$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 $SCRATCH_MNT/mysnap2 \
+    -f $tmp/2.snap 2>&1 | _filter_scratch
+
+md5sum $SCRATCH_MNT/foo | _filter_scratch
+md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch
+md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch
+
+_scratch_unmount
+_check_btrfs_filesystem $SCRATCH_DEV
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+$BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/1.snap
+md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch
+
+$BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/2.snap
+md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch
+
+_scratch_unmount
+_check_btrfs_filesystem $SCRATCH_DEV
+
+status=0
+exit

tests/btrfs/025.out

@@ -0,0 +1,18 @@
+QA output created by 025
+FSSync 'SCRATCH_MNT'
+FSSync 'SCRATCH_MNT'
+wrote 2978/2978 bytes at offset 1482752
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+FSSync 'SCRATCH_MNT'
+Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap1'
+FSSync 'SCRATCH_MNT'
+Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap2'
+At subvol SCRATCH_MNT/mysnap1
+At subvol SCRATCH_MNT/mysnap2
+129b8eaee8d3c2bcad49bec596591cb3  SCRATCH_MNT/foo
+42b6369eae2a8725c1aacc0440e597aa  SCRATCH_MNT/mysnap1/foo
+129b8eaee8d3c2bcad49bec596591cb3  SCRATCH_MNT/mysnap2/foo
+At subvol mysnap1
+42b6369eae2a8725c1aacc0440e597aa  SCRATCH_MNT/mysnap1/foo
+At snapshot mysnap2
+129b8eaee8d3c2bcad49bec596591cb3  SCRATCH_MNT/mysnap2/foo

tests/btrfs/group

@@ -27,3 +27,4 @@
 022 auto
 023 auto
 024 auto quick
+025 auto quick