mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
d2f2947517
In generic/173, we try to force a CoW to a mmap'd region to fail if there's no space to actually stage the CoW operation. That failure comes in the form of a SIGBUS to xfs_io. If the tester just happens to have a nonzero coresize ulimit set, a core dump is generated and the test is marked as having failed, even though the dump generation is exactly the correct behavior. Therefore, set the coresize ulimit to zero while calling _mwrite_byte. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
105 lines
2.8 KiB
Bash
Executable File
105 lines
2.8 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 173
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#
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# Reflink a file, use up the rest of the space, then try to observe ENOSPC
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# while copy-on-writing the file via mmap.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015, Oracle and/or its affiliates. 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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. ./common/reflink
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# real QA test starts here
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_supported_os Linux
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_require_scratch_reflink
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_require_cp_reflink
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rm -f $seqres.full
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echo "Format and mount"
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_scratch_mkfs > $seqres.full 2>&1
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_scratch_mount >> $seqres.full 2>&1
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testdir=$SCRATCH_MNT/test-$seq
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mkdir $testdir
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echo "Reformat with appropriate size"
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blksz="$(_get_block_size $testdir)"
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nr_blks=10240
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umount $SCRATCH_MNT
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sz_bytes=$((nr_blks * 8 * blksz))
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if [ $sz_bytes -lt $((32 * 1048576)) ]; then
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sz_bytes=$((32 * 1048576))
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fi
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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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rm -rf $testdir
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mkdir $testdir
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echo "Create a big file and reflink it"
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_pwrite_byte 0x61 0 $((blksz * nr_blks)) $testdir/bigfile >> $seqres.full 2>&1
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_cp_reflink $testdir/bigfile $testdir/clonefile
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sync
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echo "Allocate the rest of the space"
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nr_free=$(stat -f -c '%f' $testdir)
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_fill_fs $((blksz * nr_free)) $testdir/space $blksz 0 >> $seqres.full 2>&1
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sync
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echo "mmap CoW the big file"
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core_ulimit="$(ulimit -c)"
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ulimit -c 0
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out="$(_mwrite_byte 0x62 0 $((blksz * nr_blks)) $((blksz * nr_blks)) $testdir/bigfile 2>&1)"
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err="$?"
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if [ $err -lt 128 ]; then
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echo "mmap CoW should have failed with SIGBUS, got SIG$(kill -l $err)"
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fi
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echo "Remount and try CoW again"
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_scratch_cycle_mount
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out="$(_mwrite_byte 0x62 0 $((blksz * nr_blks)) $((blksz * nr_blks)) $testdir/bigfile 2>&1)"
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err="$?"
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if [ $err -lt 128 ]; then
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echo "mmap CoW should have failed with SIGBUS, got SIG$(kill -l $err)"
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fi
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ulimit -c "${core_ulimit}"
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# success, all done
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status=0
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exit
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