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Theodore Ts'o
76c21d6815
This makes it clear when we are using "mount ; umount" versus "mount
-o remount" for most file systems. The reason for this distinction is
(a) tests may want to test the difference between what happens on the
remount versus the munt paths, (b) with tmpfs, "mount ; umount" will
cause the contents of all of the files to disappear which makes many
tests sad, and (c) some mount options may not be changed using "mount
-o remount".
Currently _scratch_mount performs "_scratch_mount ; _scratch_umount"
so mechnically rename this function to _scratch_cycle_mount. This was
done mechnically using the script fragment:
git grep "_scratch_remount" | \
awk -F: '{print $1}' | sort -u | \
xargs sed -i 's/_scratch_remount/_scratch_cycle_mount/g'
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
149 lines
5.0 KiB
Bash
Executable File
149 lines
5.0 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. generic/030
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#
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# Test mapped writes against remap+truncate down/up to ensure we get the data
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# correctly written. This can expose data corruption bugs on filesystems where
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# the block size is smaller than the page size.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2014 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 $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs generic
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_supported_os IRIX Linux
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_require_scratch
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_require_xfs_io_command "mremap"
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testfile=$SCRATCH_MNT/testfile
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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# first case is just truncate down/truncate up to check that the mapped
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# write after the truncate up is correctly handled.
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$XFS_IO_PROG -t -f \
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-c "truncate 5017k" `# truncate | |` \
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-c "pwrite -S 0x58 0 5017k" `# write |X...XXX|` \
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-c "mmap -rw 0 5017k" `# mmap | |` \
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-c "truncate 5020k" `# truncate up | |` \
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-c "mremap -m 5020k" `# mremap up | |` \
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-c "mwrite -S 0x57 5017k 3k" `# mwrite | WWWWWWWWWWWWWWWW|` \
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-c "mremap 5017k " `# mremap dn | |` \
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-c "truncate 5017k" `# mremap dn | |` \
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-c "truncate 5020k" `# truncate up | |` \
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-c "mremap -m 5020k" `# mremap up | |` \
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-c "mwrite -S 0x59 5017k 3k" `# mwrite | YYYYYYYYYYYYYYYY|` \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_cycle_mount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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rm -f $testfile
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sync
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# second case is to do a mwrite between the truncate to a block on the
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# same page we are truncating within the EOF. This checks that a mapped
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# write between truncate down and truncate up a further mapped
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# write to the same page into the new space doesn't result in data being lost.
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$XFS_IO_PROG -t -f \
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-c "truncate 5017k" `# truncate | |` \
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-c "pwrite -S 0x58 0 5017k" `# write |X...XXX|` \
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-c "mmap -rw 0 5017k" `# mmap | |` \
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-c "truncate 5020k" `# truncate up | |` \
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-c "mremap -m 5020k" `# mremap up | |` \
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-c "mwrite -S 0x57 5017k 3k" `# mwrite | WWWWWWWWWWWWWWWW|` \
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-c "mremap 5017k " `# mremap dn | |` \
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-c "truncate 5017k" `# mremap dn | |` \
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-c "mwrite -S 0x5a 5016k 1k" `# mwrite | ZZZ |` \
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-c "truncate 5020k" `# truncate up | |` \
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-c "mremap -m 5020k" `# mremap up | |` \
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-c "mwrite -S 0x59 5017k 3k" `# mwrite | YYYYYYYYYYYYYYYY|` \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_cycle_mount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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# third case is the same as the first, but this time on unaligned byte
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# boundaries rather than block boundaries. This mimics the exact mmap write
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# patterns of the application that exposed the bug in the first place, and
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# so is somewhat more complex and has repeated operations in it.
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$XFS_IO_PROG -t -f \
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-c "truncate 5136912" \
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-c "pwrite -S 0x58 0 5136912" \
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-c "mmap -rw 0 5136912" \
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-c "mremap 5136912" \
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-c "truncate 5136912" \
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-c "truncate 5139720" \
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-c "mremap -m 5139720" \
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-c "mwrite -S 0 5136912 2808" \
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-c "mwrite -S 0 5136912 2808" \
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-c "mwrite -S 0 5136912 2808" \
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-c "mremap 5136912 " \
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-c "truncate 5136912" \
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-c "truncate 5139720" \
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-c "mremap -m 5139720" \
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-c "mwrite -S 0 5136912 2808" \
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-c "mwrite -S 0 5136912 2808" \
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-c "mwrite -S 0x59 5136912 2808" \
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-c "truncate 5140480" \
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-c "mremap 5140480" \
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-c "msync -s 0 5140480" \
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-c "mremap 5139720" \
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-c "munmap" \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_cycle_mount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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status=0
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exit
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