mirror of
https://github.com/linux-apfs/apfstests.git
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Xiong Zhou
5299132593
Regression case that one can write to read-only file in a DAX mountpoint. Signed-off-by: Xiong Zhou <xzhou@redhat.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
96 lines
2.6 KiB
Bash
Executable File
96 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 462
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#
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# This is a regression test for kernel commit
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# ef947b2 x86, mm: fix gup_pte_range() vs DAX mappings
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# created by Jeffrey Moyer <jmoyer@redhat.com>
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#
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# This is reproducible only when testing on pmem device
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# which is configured in "memory mode", not in "raw mode".
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Red Hat. 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 -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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_test
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_require_scratch_dax
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_require_test_program "t_mmap_write_ro"
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# running by unpriviliged user is not necessary to reproduce
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# this bug, just trying to test more.
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_require_user
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# real QA test starts here
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount "-o dax"
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# remount TEST_DEV wo/ dax
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export TEST_FS_MOUNT_OPTS=""
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_test_cycle_mount
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# prepare a 4k read-only DAX file, save its md5sum
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$XFS_IO_PROG -f -c "pwrite -S 0xFF 0 4096" \
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$SCRATCH_MNT/readonlyfile >> $seqres.full 2>&1
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chmod 0644 $SCRATCH_MNT/readonlyfile
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md5_1="$(_md5_checksum $SCRATCH_MNT/readonlyfile)"
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# prepare another 4k non-DAX file
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$XFS_IO_PROG -f -c "pwrite -S 0x00 0 4096" \
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$TEST_DIR/${seq}.file >> $seqres.full 2>&1
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# allow qa_user access
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chown $qa_user $TEST_DIR/${seq}.file
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# run test programme, read another file writing into
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# the read-only file with mmap, which should fail.
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_user_do "src/t_mmap_write_ro $TEST_DIR/${seq}.file \
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$SCRATCH_MNT/readonlyfile"
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# read-only file should not get updated, md5sum again.
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md5_2="$(_md5_checksum $SCRATCH_MNT/readonlyfile)"
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[ "$md5_1" != "$md5_2" ] && echo "read only file changed"
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# success, all done
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status=0
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exit
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