| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved. |
| # |
| # FS QA Test No. 253 |
| # |
| # Truncate a file at midway through a CoW region. |
| # |
| # This test is dependent on the system page size, so we cannot use md5 in |
| # the golden output; we can only compare to a check file. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick clone |
| |
| # Import common functions. |
| . ./common/filter |
| . ./common/reflink |
| |
| _require_scratch_reflink |
| _require_cp_reflink |
| _require_xfs_io_command "truncate" |
| |
| echo "Format and mount" |
| _scratch_mkfs > $seqres.full 2>&1 |
| _scratch_mount >> $seqres.full 2>&1 |
| |
| testdir=$SCRATCH_MNT/test-$seq |
| mkdir $testdir |
| |
| blksz=65536 |
| nr=4 |
| filesize=$((blksz * nr)) |
| |
| echo "Create the original files" |
| _pwrite_byte 0x61 0 $filesize $testdir/file1 >> $seqres.full |
| _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full |
| _pwrite_byte 0x61 0 $filesize $testdir/file2.chk >> $seqres.full |
| _scratch_cycle_mount |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file2.chk | _filter_scratch |
| |
| echo "CoW and unmount" |
| $XFS_IO_PROG -f -c "pwrite -S 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "truncate $((blksz * 2))" $testdir/file2 >> $seqres.full |
| _scratch_cycle_mount |
| $XFS_IO_PROG -f -c "pwrite -S 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "truncate $((blksz * 2))" $testdir/file2.chk >> $seqres.full |
| _scratch_cycle_mount |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file2.chk | _filter_scratch |
| |
| # success, all done |
| status=0 |
| exit |
