| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2017 SUSE. All Rights Reserved. |
| # |
| # FS QA Test 438 |
| # |
| # This is a regression test for kernel patch |
| # "ext4: Fix data corruption for mmap writes" |
| # |
| # The problem this test checks for is when too much is zeroed in the tail |
| # page that gets written out just while the file gets extended and written |
| # to through mmap. |
| # |
| # Based on test program by Michael Zimmer <michael@swarm64.com> |
| # |
| . ./common/preamble |
| _begin_fstest auto |
| |
| # Override the default cleanup function. |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| rm -f $FILE |
| } |
| |
| # Import common functions. |
| . ./common/filter |
| |
| # Modify as appropriate. |
| _require_test |
| _require_test_program "t_mmap_fallocate" |
| |
| FILE=$TEST_DIR/testfile_fallocate |
| # Make sure file exists |
| echo >$FILE |
| # Force frequent writeback of the file |
| ( |
| trap "STOP=1" SIGTERM |
| STOP=0 |
| while [ $STOP -eq 0 ]; do |
| $XFS_IO_PROG -c fsync $FILE |
| done |
| )& |
| SYNCPID=$! |
| |
| # Run the test |
| $here/src/t_mmap_fallocate $FILE 256 && echo "Silence is golden" |
| |
| kill -TERM $SYNCPID |
| wait $SYNCPID |
| |
| # success, all done |
| status=0 |
| exit |
