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https://github.com/linux-apfs/apfstests.git
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Zorro Lang
1083413cd4
Although ro-compat features cannot be mounted rw, a bug allows an ro->rw remount transition, and this will corrupt the filesystem if it contains ro-compat features unknown to the running kernel. This bug has been fixed on linux kernel (d0a58e8 xfs: disallow rw remount on fs with unknown ro-compat features), this case is the regression testcase of that bug. Signed-off-by: Zorro Lang <zlang@redhat.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
94 lines
2.6 KiB
Bash
Executable File
94 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 270
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#
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# Today ro-compat features can't be mounted rw, but a bug allows
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# an ro->rw remount transition. This bug has been fixed on linux
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# kernel (d0a58e8 xfs: disallow rw remount on fs with unknown
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# ro-compat features), and this case is the regression testcase.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2016 Red Hat, 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 15
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_cleanup()
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{
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cd /
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rm -f $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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs xfs
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_supported_os Linux
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# skip fs check because superblock contains unknown ro-compat features
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_require_scratch_nocheck
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# Only V5 XFS disallow rw mount/remount with unknown ro-compat features
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_require_scratch_xfs_crc
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_scratch_mkfs_xfs >>$seqres.full 2>&1
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# set the highest bit of features_ro_compat, use it as an unknown
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# feature bit. If one day this bit become known feature, please
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# change this case.
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$XFS_DB_PROG -x -c "sb 0" -c "write features_ro_compat $((2**31))" $SCRATCH_DEV
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# rw mount with unknown ro-compat feature should fail
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echo "rw mount test"
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_scratch_mount 2>>$seqres.full
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if [ $? -eq 0 ]; then
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_fail "rw mount test failed"
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fi
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# But ro mount should succeed
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echo "ro mount test"
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_scratch_mount -o ro
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if [ $? -ne 0 ]; then
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_fail "ro mount test failed"
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else
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# no hang/panic is fine
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$FSSTRESS_PROG -d $SCRATCH_MNT -p 4 -n 400 >>$seqres.full 2>&1
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fi
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# remount as rw, kernel should reject it
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echo "rw remount test"
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_scratch_remount rw 2>>$seqres.full
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if [ $? -eq 0 ]; then
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dmesg | tail -n 15 >> $seqres.full
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_fail "rw remount test failed"
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fi
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_scratch_unmount
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# success, all done
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status=0
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exit
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