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https://github.com/linux-apfs/apfstests.git
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Goldwyn Rodrigues
1ed1aad2f8
Getting an error midway through a direct write would return an error and the error-code is returned in the write() call. However, partial data is over-written during the call. This tests simulates the ENOSPC error to check for partial direct write consistency. [eguan: use $AWK_PROG instead of bare awk] Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
97 lines
2.9 KiB
Bash
Executable File
97 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 472
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#
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# write() to a file opened with O_DIRECT with count > remaining
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# bytes. In case of a bug, the write returns ENOSPC wheras the
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# showing no data is written, but the file contents are updated.
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# Result should be the write should return remaining bytes
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# (to aligned bytes) instead of ENOSPC error.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017, SUSE Linux Products. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -rf $tmp.* $testdir1
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/populate
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. ./common/filter
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. ./common/attr
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# real QA test starts here
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_supported_os Linux
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_require_odirect
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_require_xfs_io_command pwrite -O
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_require_scratch
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rm -f $seqres.full
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echo "Reformat with 320M size"
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sz_bytes=$((320 * 1024 * 1024))
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_scratch_mkfs_sized $sz_bytes >> $seqres.full 2>&1
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_scratch_mount >> $seqres.full 2>&1
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testdir=$SCRATCH_MNT/$seq
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mkdir $testdir
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# Reserve some space to remove later
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$XFS_IO_PROG -f -c "pwrite 0 2M" $testdir/reserve > /dev/null
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mkdir $testdir/fillspace
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echo "Fill the filesystem"
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_fill_fs $(( 1024 * 1024 * 1024 )) $testdir/fillspace 4096 0 > /dev/null 2>&1
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# Remove the reserve file to work on almost full filesystem
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rm $testdir/reserve
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sync
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# Create a file using buffered I/O which succeeds only partially
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$XFS_IO_PROG -f -c "pwrite -w -S 0xaa 0 4M" $testdir/partial
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# re-write using direct I/O with another pattern using one single buffer, once
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write_size=`$XFS_IO_PROG -d -c "pwrite -O -S 0xbb -V 1 -b 4M 0 4M" $testdir/partial | \
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$AWK_PROG '/^wrote/ {split($2, bytes, "/"); print bytes[1]}'`
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if [ -z $write_size ]; then
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write_size=0
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fi
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# If bug is not fixed, pwrite will return error and but still write data
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if [ $write_size -gt 0 ]; then
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echo "pwrite wrote more than zero bytes."
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else
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echo "pwrite wrote zero bytes"
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fi
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# read the partial file to check if data written is of last write
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$XFS_IO_PROG -c "pread 0 1M -v" $testdir/partial | _filter_xfs_io_unique
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# success, all done
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status=0
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exit
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