| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # FS QA Test No. 672 |
| # |
| # Test for races or FS corruption when mmap writing to a file that's also |
| # the target of a reflink operation. (MMAP version of generic/168,170) |
| # |
| . ./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 |
| |
| 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 $testdir |
| |
| loops=1024 |
| nr_loops=$((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 |
| _scratch_cycle_mount |
| |
| # mmap overwriter... |
| overwrite() { |
| while [ ! -e $finished_file ]; do |
| seq $nr_loops -1 0 | while read i; do |
| $XFS_IO_PROG -f -c "mmap -rw $((i * blksz)) $blksz" \ |
| -c "mwrite -S 0x63 $((i * blksz)) $blksz" $testdir/file2 >> $seqres.full |
| done |
| done |
| } |
| |
| echo "Reflink and mmap write the target" |
| overwrite & |
| seq 1 10 | while read j; do |
| seq 0 $nr_loops | while read i; do |
| _reflink_range $testdir/file1 $((i * blksz)) \ |
| $testdir/file2 $((i * blksz)) $blksz >> $seqres.full |
| [ $? -ne 0 ] && exit |
| done |
| done |
| touch $finished_file |
| wait |
| |
| # success, all done |
| status=0 |
| exit |