2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
7 # Test for races or FS corruption when DIO writing to a file that's also
8 # the source of a reflink operation.
11 _begin_fstest auto clone
13 _register_cleanup "_cleanup" BUS
15 # Override the default cleanup function.
19 rm -rf $tmp.* $finished_file
23 # Import common functions.
27 # real QA test starts here
28 _require_scratch_reflink
32 echo "Format and mount"
33 _scratch_mkfs > $seqres.full 2>&1
34 _scratch_mount >> $seqres.full 2>&1
36 testdir=$SCRATCH_MNT/test-$seq
37 finished_file=/tmp/finished
38 do_snapshot=/tmp/snapshot
43 nr_loops=$((loops - 1))
46 echo "Initialize file"
48 _pwrite_byte 0x61 0 $((loops * blksz)) $testdir/file1 >> $seqres.full
53 # We rate limit the snapshot creator to one snapshot per full file write. this
54 # limits the runtime on slow devices, whilst not substantially reducing the the
55 # number of snapshots taken on fast devices.
58 while [ ! -e $finished_file ]; do
59 if [ ! -e $do_snapshot ]; then
63 out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
65 echo "$out" | grep -q "No space left" && break
66 test -n "$out" && echo "$out"
67 test $res -ne 0 && break
73 echo "Snapshot a file undergoing directio rewrite"
75 seq $nr_loops -1 0 | while read i; do
76 _pwrite_byte 0x63 $((i * blksz)) $blksz -d $testdir/file1 >> $seqres.full