mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
727d47730d
Add a few horrible opt-in stress tests to see what happens if we try to reflink the same block billions of times, and what happens if we run out of space while reflinking a file. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
100 lines
2.6 KiB
Bash
Executable File
100 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 175
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#
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# Try to hit the maximum reference count (eek!)
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#
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# This test runs extremely slowly, so it's not automatically run anywhere.
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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 "$tmp".* "$TESTDIR1"
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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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# real QA test starts here
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_supported_os Linux
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_require_scratch_reflink
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_require_cp_reflink
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rm -f "$seqres.full"
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echo "Format and mount"
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_scratch_mkfs > "$seqres.full" 2>&1
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_scratch_mount >> "$seqres.full" 2>&1
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TESTDIR="$SCRATCH_MNT/test-$seq"
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rm -rf "$TESTDIR"
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mkdir "$TESTDIR"
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# Well let's hope the maximum reflink count is (less than (ha!)) 2^32...
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echo "Create a one block file"
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BLKSZ="$(stat -f "$TESTDIR" -c '%S')"
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_pwrite_byte 0x61 0 $BLKSZ "$TESTDIR/file1" >> "$seqres.full"
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_pwrite_byte 0x62 0 $BLKSZ "$TESTDIR/file2" >> "$seqres.full"
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_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2" >> "$seqres.full"
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nr=32
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fnr=32
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for i in $(seq 0 $fnr); do
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echo " ++ Reflink size $i, $(( (2 ** i) * BLKSZ)) bytes" | tee -a "$seqres.full"
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n=$(( (2 ** i) * BLKSZ))
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_reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file1" $n $n >> "$seqres.full" || break
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done
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nrf=$((nr - fnr))
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echo "Clone $((2 ** nrf)) files"
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seq 0 $((2 ** nrf)) | while read i; do
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_cp-reflink "$TESTDIR/file1" "$TESTDIR/file1-$i"
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done
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echo "Check scratch fs"
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umount "$SCRATCH_MNT"
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_check_scratch_fs
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echo "Remove big file and recheck"
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_scratch_mount >> "$seqres.full" 2>&1
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umount "$SCRATCH_MNT"
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_check_scratch_fs
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echo "Remove all files and recheck"
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_scratch_mount >> "$seqres.full" 2>&1
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umount "$SCRATCH_MNT"
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_check_scratch_fs
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# success, all done
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status=0
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exit
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