#! /bin/bash # SPDX-License-Identifier: GPL-2.0 # # FS QA Test No. 670 # # Test for races or FS corruption between reflink and mmap reading the # target file. (MMAP version of generic/164,165) # . ./common/preamble _begin_fstest auto clone _register_cleanup "_cleanup" BUS # Import common functions. . ./common/filter . ./common/reflink # real QA test starts here _require_scratch_reflink _require_cp_reflink echo "Format and mount" _scratch_mkfs > $seqres.full 2>&1 _scratch_mount >> $seqres.full 2>&1 testdir=$SCRATCH_MNT/test-$seq finished_file=/tmp/finished rm -rf $finished_file mkdir $testdir loops=512 nr_loops=$((loops - 1)) blksz=65536 echo "Initialize files" echo >> $seqres.full _pwrite_byte 0x61 0 $((loops * blksz)) $testdir/file1 >> $seqres.full _pwrite_byte 0x62 0 $((loops * blksz)) $testdir/file2 >> $seqres.full _cp_reflink $testdir/file1 $testdir/file3 _scratch_cycle_mount fbytes() { # Different with generic/164,165, mread copies data from mmapped area # one-byte-at-a-time, which may cause races during reflink_range(). # So the result of _mread_range() may be a mix of 61 and 62. grep -E -v '((61|62) ){15}(61|62)' } reader() { while [ ! -e $finished_file ]; do _mread_range $testdir/file3 0 $((loops * blksz)) | fbytes done } echo "Reflink and mmap reread the files!" reader & for i in `seq 1 2`; do seq $nr_loops -1 0 | while read i; do _reflink_range $testdir/file1 $((i * blksz)) \ $testdir/file3 $((i * blksz)) $blksz >> $seqres.full [ $? -ne 0 ] && break done seq $nr_loops -1 0 | while read i; do _reflink_range $testdir/file2 $((i * blksz)) \ $testdir/file3 $((i * blksz)) $blksz >> $seqres.full [ $? -ne 0 ] && break done done echo "Finished reflinking" touch $finished_file wait # success, all done status=0 exit