From 043e5bb164a64fcaaa316bcbdcd9ee1df6967088 Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Wed, 4 Nov 2020 11:13:37 +0000 Subject: [PATCH 1/1] generic: test number of blocks used by a file after mwrite into a hole Test that after doing a memory mapped write to an empty file, a call to stat(2) reports a non-zero number of used blocks. This is motivated by a bug in btrfs where the number of blocks used does not change. It currenly fails on btrfs and it is fixed by a patch that has the following subject: "btrfs: fix missing delalloc new bit for new delalloc ranges" Signed-off-by: Filipe Manana Reviewed-by: Josef Bacik Signed-off-by: Eryu Guan --- tests/generic/614 | 50 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/614.out | 2 ++ tests/generic/group | 1 + 3 files changed, 53 insertions(+) create mode 100755 tests/generic/614 create mode 100644 tests/generic/614.out diff --git a/tests/generic/614 b/tests/generic/614 new file mode 100755 index 00000000..80edf9cd --- /dev/null +++ b/tests/generic/614 @@ -0,0 +1,50 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved. +# +# FS QA Test No. 614 +# +# Test that after doing a memory mapped write to an empty file, a call to +# stat(2) reports a non-zero number of used blocks. +# +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 + +# real QA test starts here +_supported_fs generic +_require_scratch + +rm -f $seqres.full + +_scratch_mkfs >>$seqres.full 2>&1 +_scratch_mount + +$XFS_IO_PROG -f -c "truncate 64K" \ + -c "mmap -w 0 64K" \ + -c "mwrite -S 0xab 0 64K" \ + -c "munmap" \ + $SCRATCH_MNT/foobar | _filter_xfs_io + +blocks_used=$(stat -c %b $SCRATCH_MNT/foobar) +if [ $blocks_used -eq 0 ]; then + echo "error: stat(2) reported 0 used blocks" +fi + +echo "Silence is golden" + +status=0 +exit diff --git a/tests/generic/614.out b/tests/generic/614.out new file mode 100644 index 00000000..3db70236 --- /dev/null +++ b/tests/generic/614.out @@ -0,0 +1,2 @@ +QA output created by 614 +Silence is golden diff --git a/tests/generic/group b/tests/generic/group index 31057ac8..ab8ae74e 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -616,3 +616,4 @@ 611 auto quick attr 612 auto quick clone 613 auto quick encrypt +614 auto quick rw -- 2.30.2