4 # Ensuring that copy on write in buffered mode works when the CoW
5 # range originally covers multiple extents, some holes, some not.
6 # - Create a file and truncate a second file.
7 # - Reflink the odd blocks of the first file into the second file.
8 # - CoW across the halfway mark, starting with the unwritten extent.
9 # - Check that the files are now different where we say they're different.
11 #-----------------------------------------------------------------------
12 # Copyright (c) 2015, Oracle and/or its affiliates. All Rights Reserved.
14 # This program is free software; you can redistribute it and/or
15 # modify it under the terms of the GNU General Public License as
16 # published by the Free Software Foundation.
18 # This program is distributed in the hope that it would be useful,
19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 # GNU General Public License for more details.
23 # You should have received a copy of the GNU General Public License
24 # along with this program; if not, write the Free Software Foundation,
25 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 #-----------------------------------------------------------------------
29 seqres=$RESULT_DIR/$seq
30 echo "QA output created by $seq"
34 status=1 # failure is the default!
35 trap "_cleanup; exit \$status" 0 1 2 3 15
40 rm -rf $tmp.* $testdir
43 # get standard environment, filters and checks
48 # real QA test starts here
50 _require_scratch_reflink
51 _require_xfs_io_command "falloc"
55 echo "Format and mount"
56 _scratch_mkfs > $seqres.full 2>&1
57 _scratch_mount >> $seqres.full 2>&1
59 testdir=$SCRATCH_MNT/test-$seq
62 echo "Create the original files"
65 filesize=$((blksz * nr))
66 _weave_reflink_holes $blksz $nr $testdir/file1 $testdir/file3 >> $seqres.full
70 md5sum $testdir/file1 | _filter_scratch
71 md5sum $testdir/file3 | _filter_scratch
72 md5sum $testdir/file3.chk | _filter_scratch
74 echo "CoW across the transition"
75 cowoff=$((filesize / 4))
76 cowsz=$((filesize / 2))
77 $XFS_IO_PROG -f -c "pwrite -S 0x63 -b $cowsz $cowoff $cowsz" $testdir/file3 >> $seqres.full
78 _pwrite_byte 0x63 $cowoff $cowsz $testdir/file3.chk >> $seqres.full
82 md5sum $testdir/file1 | _filter_scratch
83 md5sum $testdir/file3 | _filter_scratch
84 md5sum $testdir/file3.chk | _filter_scratch