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Theodore Ts'o
dddae984bc
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 _test_mount performs "_test_mount ; _test_umount"
so mechnically rename this function to _test_cycle_mount. This was
done mechnically using the script fragment:
git grep -E "_test_remount" | \
awk -F: '{print $1}' | sort -u | grep -v tests/xfs/189 \
xargs sed -i 's/_test_remount/_test_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>
126 lines
3.7 KiB
Bash
Executable File
126 lines
3.7 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 156
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#
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# Ensure that fallocate on reflinked files actually CoWs the shared blocks.
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# - Record fs block usage (0)
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# - Create a file and some reflink copies
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# - Record fs block usage (1)
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# - funshare half of one of the copies
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# - Record fs block usage (2)
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# - funshare all of the copies
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# - Record fs block usage (3)
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# - rewrite the original file
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# - Record fs block usage (4)
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# - Compare fs block usage of 0-4 to ensure that block usage behaves as
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# we expect.
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#
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# "funshare" refers to fallocate copy-on-writing the shared blocks
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015, Oracle and/or its affiliates. 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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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.* $testdir
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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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. ./common/attr
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. ./common/reflink
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if [ $FSTYP = "btrfs" ]; then
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_notrun "btrfs doesn't handle unshare on fallocate"
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fi
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# real QA test starts here
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_supported_os Linux
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_require_test_reflink
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_require_cp_reflink
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_require_xfs_io_command "falloc"
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rm -f $seqres.full
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testdir=$TEST_DIR/test-$seq
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rm -rf $testdir
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mkdir $testdir
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echo "Create the original file blocks"
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blksz="$(stat -f $testdir -c '%S')"
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blks=2000
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margin='15%'
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sz=$((blksz * blks))
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free_blocks0=$(stat -f $testdir -c '%f')
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nr=4
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filesize=$((blksz * nr))
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_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full
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_test_cycle_mount
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echo "Create the reflink copies"
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for i in `seq 2 $nr`; do
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_cp_reflink $testdir/file1 $testdir/file$i
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done
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_test_cycle_mount
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free_blocks1=$(stat -f $testdir -c '%f')
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echo "funshare part of a file"
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$XFS_IO_PROG -f -c "falloc 0 $((sz / 2))" $testdir/file2
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_test_cycle_mount
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echo "funshare some of the copies"
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$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file2
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$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file3
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_test_cycle_mount
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free_blocks2=$(stat -f $testdir -c '%f')
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echo "funshare the rest of the files"
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$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file4
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$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file1
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_test_cycle_mount
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free_blocks3=$(stat -f $testdir -c '%f')
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echo "Rewrite the original file"
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_pwrite_byte 0x65 0 $sz $testdir/file1 >> $seqres.full
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_test_cycle_mount
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free_blocks4=$(stat -f $testdir -c '%f')
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#echo $free_blocks0 $free_blocks1 $free_blocks2 $free_blocks3 $free_blocks4
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_within_tolerance "free blocks after reflinking" $free_blocks1 $((free_blocks0 - blks)) $margin -v
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_within_tolerance "free blocks after nocow'ing some copies" $free_blocks2 $((free_blocks1 - (2 * blks))) $margin -v
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_within_tolerance "free blocks after nocow'ing all copies" $free_blocks3 $((free_blocks2 - blks)) $margin -v
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_within_tolerance "free blocks after overwriting original" $free_blocks4 $free_blocks3 $margin -v
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_within_tolerance "free blocks after all tests" $free_blocks4 $((free_blocks0 - (4 * blks))) $margin -v
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# success, all done
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status=0
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exit
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