| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (C) 2021 SUSE Linux Products GmbH. All Rights Reserved. |
| # |
| # FS QA Test No. btrfs/234 |
| # |
| # Test cases where a direct IO write, with O_DSYNC, can not be done and has to |
| # fallback to a buffered write. |
| # |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/attr |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _require_scratch |
| _require_odirect |
| _require_chattr c |
| |
| rm -f $seqres.full |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| # Create a test file with compression enabled (chattr +c). |
| touch $SCRATCH_MNT/foo |
| $CHATTR_PROG +c $SCRATCH_MNT/foo |
| |
| # Now do a buffered write to create compressed extents. |
| $XFS_IO_PROG -s -c "pwrite -S 0xab -b 1M 0 1M" $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Now do the direct IO write with O_DSYNC into a file range that contains |
| # compressed extents. It should fallback to buffered IO and succeed. |
| $XFS_IO_PROG -d -s -c "pwrite -S 0xcd 512K 512K" $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Now try doing a direct IO write, with O_DSYNC, for a range that starts with |
| # non-aligned offset. It should also fallback to buffered IO and succeed. |
| $XFS_IO_PROG -f -d -s -c "pwrite -S 0xef 1111 512K" $SCRATCH_MNT/bar | _filter_xfs_io |
| |
| # Unmount, mount again, and verify we have the expected data. |
| _scratch_cycle_mount |
| |
| echo "File foo data:" |
| od -A d -t x1 $SCRATCH_MNT/foo |
| echo "File bar data:" |
| od -A d -t x1 $SCRATCH_MNT/bar |
| |
| status=0 |
| exit |