| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2023 Meta Platforms, Inc. All Rights Reserved. |
| # |
| # FS QA Test 708 |
| # |
| # Test iomap direct_io partial writes. |
| # |
| # Create a reasonably large file, then run a program which mmaps it, |
| # touches the first page, then dio writes it to a second file. This |
| # can result in a page fault reading from the mmapped dio write buffer and |
| # thus the iomap direct_io partial write codepath. |
| # |
| . ./common/preamble |
| _begin_fstest quick auto mmap |
| |
| [ $FSTYP == "btrfs" ] && \ |
| _fixed_by_kernel_commit b73a6fd1b1ef \ |
| "btrfs: split partial dio bios before submit" |
| |
| _require_test |
| _require_odirect |
| _require_test_program dio-buf-fault |
| src=$TEST_DIR/dio-buf-fault-$seq.src |
| dst=$TEST_DIR/dio-buf-fault-$seq.dst |
| |
| rm -rf "$src" "$dst" |
| |
| echo "Silence is golden" |
| |
| $XFS_IO_PROG -fc "pwrite -q -S 0xcd 0 $((2 * 1024 * 1024))" $src |
| $here/src/dio-buf-fault $src $dst > /dev/null || _fail "failed doing the dio copy" |
| diff $src $dst |
| |
| # success, all done |
| status=$? |
| exit |
