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Darrick J. Wong
6813e5213d
Linux swapfiles use bmap which has no ability to tell the swap code that the blocks its reporting aren't actually on the data device. Therefore, swapon on a realtime file could corrupt random blocks on the data device, so we must ensure that swapon cannot happen. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <eguan@redhat.com>
75 lines
1.9 KiB
Bash
Executable File
75 lines
1.9 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 419
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#
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# Check that we can't swapon a realtime file.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Oracle, Inc. 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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#
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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 7 15
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_cleanup()
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{
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cd /
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rm -rf $tmp.*
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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/filter
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# real QA test starts here
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_supported_os Linux
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_supported_fs xfs
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_require_realtime
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_require_scratch_swapfile
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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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blocks=160
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blksz=65536
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echo "Initialize file"
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echo >> $seqres.full
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$XFS_IO_PROG -c "open -f -R $testdir/dummy" $testdir >> $seqres.full
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echo moo >> $testdir/dummy
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$XFS_IO_PROG -c "open -f -R $testdir/file1" $testdir >> $seqres.full
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_pwrite_byte 0x61 0 $((blocks * blksz)) $testdir/file1 >> $seqres.full
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mkswap -U 27376b42-ff65-42ca-919f-6c9b62292a5c $testdir/file1 >> $seqres.full
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echo "Try to swapon"
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swapon $testdir/file1 2>&1 | _filter_scratch
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swapoff $testdir/file1 >> $seqres.full 2>&1
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# success, all done
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status=0
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exit
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