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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>
112 lines
2.8 KiB
Bash
Executable File
112 lines
2.8 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 032
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#
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# This test implements a data corruption scenario on XFS filesystems with
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# sub-page sized blocks and unwritten extents. Inode lock contention during
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# writeback of pages to unwritten extents leads to failure to convert those
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# extents on I/O completion. This causes data corruption as unwritten extents
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# are always read back as zeroes.
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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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kill -9 $syncpid > /dev/null 2>&1
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wait
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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/punch
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# real QA test starts here
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rm -f $seqres.full
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_syncloop()
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{
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while [ true ]; do
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sync
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done
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}
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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_require_xfs_io_command "falloc"
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_require_xfs_io_command "fiemap"
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_scratch_mkfs >/dev/null 2>&1
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_scratch_mount
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# run background sync thread
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_syncloop &
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syncpid=$!
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for iters in $(seq 1 100)
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do
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rm -f $SCRATCH_MNT/file
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# create a delalloc block in each page of the first 64k of the file
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for pgoff in $(seq 0 0x1000 0xf000); do
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offset=$((pgoff + 0xc00))
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$XFS_IO_PROG -f \
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-c "pwrite $offset 0x1" \
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$SCRATCH_MNT/file >> $seqres.full 2>&1
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done
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# preallocate the first 64k and overwite, writing past 64k to contend
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# with writeback
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$XFS_IO_PROG \
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-c "falloc 0 0x10000" \
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-c "pwrite 0 0x100000" \
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-c "fsync" \
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$SCRATCH_MNT/file >> $seqres.full 2>&1
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# Check for unwritten extents. We should have none since we wrote over
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# the entire preallocated region and ran fsync.
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$XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/file | \
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tee -a $seqres.full | \
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_filter_fiemap | grep unwritten
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[ $? == 0 ] && _fail "Unwritten extents found!"
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done
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echo $iters iterations
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kill $syncpid
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wait
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# clear page cache and dump the file
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_scratch_cycle_mount
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hexdump $SCRATCH_MNT/file
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status=0
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exit
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