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https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
6bd4b513af
On certain configurations (e.g. MOUNT_OPTIONS="-o dax") we get different allocation patterns due to the writes being done in multiple pwrite() calls. e.g. the write is 8k, but the buffer size is 4k, and so the filesystem sees 4k writes. If the filesytem is not using delayed allocation, then the allocation context is a 4k write rather than an 8k write and so they don't get appropriately aligned. Fix this by making the write buffer the same size and the writes being done. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
91 lines
2.2 KiB
Bash
Executable File
91 lines
2.2 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 203
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#
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# Test out reallocation of the extent array in xfs_io.
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# Based on a testcase from Tomasz Majkowski <moosh009@gmail.com>.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2009 Christoph Hellwig.
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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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#
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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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_write_holes()
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{
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file=$1
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holes=$2
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let writes=$holes+1
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let fsize=$(($writes * 0x100000))
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# prevent EOF preallocation from affecting results
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$XFS_IO_PROG -f $file -c "truncate $fsize"
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offset=0
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for i in `seq 0 $writes`; do
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$XFS_IO_PROG -f $file -c "pwrite -b 64k -q $offset 64k"
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let offset=$offset+0x100000
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done
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}
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# 0: [0..7]: 104..111
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# 1: [8..2047]: hole
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_filter_bmap()
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{
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_filter_scratch |
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awk '$3 ~ /hole/ { print $1, $2, $3; next }
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{print $1, $2; next}'
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}
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_cleanup()
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{
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rm -f $SCRATCH_MNT/r??
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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rm -f $seqres.full
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs xfs
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_supported_os Linux
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_require_scratch
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount > /dev/null 2>&1
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for i in 10 14 15 16 17 28 29 30 31; do
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rm -f $SCRATCH_MNT/hole_file
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_write_holes $SCRATCH_MNT/hole_file${i} ${i}
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done
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for i in 10 14 15 16 17 28 29 30 31; do
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xfs_bmap $SCRATCH_MNT/hole_file${i} | _filter_bmap
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echo
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done
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# success, all done
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echo "*** done"
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status=0
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