| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved. |
| # |
| # FS QA Test No. 281 |
| # |
| # Test mmap CoW behavior when the write permanently fails. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick clone eio |
| |
| # Override the default cleanup function. |
| _cleanup() |
| { |
| cd / |
| rm -rf $tmp.* $TEST_DIR/mwrite.out |
| _dmerror_cleanup |
| } |
| |
| # Import common functions. |
| . ./common/filter |
| . ./common/reflink |
| . ./common/dmerror |
| |
| # real QA test starts here |
| _require_scratch_reflink |
| _require_cp_reflink |
| _require_dm_target error |
| |
| echo "Format and mount" |
| _scratch_mkfs > $seqres.full 2>&1 |
| _dmerror_init |
| _dmerror_mount >> $seqres.full 2>&1 |
| |
| testdir=$SCRATCH_MNT/test-$seq |
| mkdir $testdir |
| |
| blksz=65536 |
| nr=640 |
| bufnr=128 |
| filesize=$((blksz * nr)) |
| bufsize=$((blksz * bufnr)) |
| |
| _require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4)) |
| |
| echo "Create the original files" |
| $XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full |
| _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full |
| _dmerror_unmount |
| _dmerror_mount |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| |
| echo "CoW and unmount" |
| sync |
| _dmerror_load_error_table |
| # Insulate ourselves against bash reporting the SIGBUS when we try to modify |
| # the metadata. |
| cat > $tmp.run << ENDL |
| ulimit -c 0 |
| $XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" \ |
| -c "msync -s 0 $filesize" $testdir/file2 >> $seqres.full 2>&1 |
| ENDL |
| bash $tmp.run 2> /dev/null |
| |
| echo "Clean up the mess" |
| _dmerror_unmount |
| _dmerror_cleanup |
| _repair_scratch_fs >> $seqres.full |
| _scratch_mount >> $seqres.full 2>&1 |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| |
| # success, all done |
| status=0 |
| exit |