mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
db4284f312
Ensure that copy-on-writing a reflinked file when there's no free disk space reflects the desired ENOSPC back to userspace during the write call. Tests the buffered IO, direct IO, and mmap write paths. 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>
108 lines
3.0 KiB
Bash
Executable File
108 lines
3.0 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 171
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#
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# Reflink a file, use up the rest of the space, then try to observe ENOSPC
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# while copy-on-writing the file via the page cache.
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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 "$TESTDIR"
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echo "Reformat with appropriate size"
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BLKSZ="$(stat -f "$TESTDIR" -c '%S')"
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NR_BLKS=10240
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umount "$SCRATCH_MNT"
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SZ_BYTES=$((NR_BLKS * 8 * BLKSZ))
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if [ $SZ_BYTES -lt $((32 * 1048576)) ]; then
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SZ_BYTES=$((32 * 1048576))
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fi
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_scratch_mkfs_sized $SZ_BYTES >> "$seqres.full" 2>&1
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_scratch_mount >> "$seqres.full" 2>&1
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rm -rf "$TESTDIR"
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mkdir "$TESTDIR"
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echo "Create a big file and reflink it"
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_pwrite_byte 0x61 0 $((BLKSZ * NR_BLKS)) "$TESTDIR/bigfile" >> "$seqres.full" 2>&1
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_cp_reflink "$TESTDIR/bigfile" "$TESTDIR/clonefile"
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sync
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echo "Allocate the rest of the space"
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NR_FREE="$(stat -f -c '%f' "$TESTDIR")"
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touch "$TESTDIR/file0" "$TESTDIR/file1"
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_pwrite_byte 0x61 0 $((BLKSZ * NR_FREE)) "$TESTDIR/eat_my_space" >> "$seqres.full" 2>&1
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sync
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echo "CoW the big file"
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out="$(_pwrite_byte 0x62 0 $((BLKSZ * NR_BLKS)) "$TESTDIR/bigfile" 2>&1)"
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echo "${out}" | grep -q "No space left on device" || echo "CoW should have failed with ENOSPC"
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echo "${out}" >> "$seqres.full" 2>&1
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echo "${out}"
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echo "Remount and try CoW again"
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_scratch_remount
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out="$(_pwrite_byte 0x62 0 $((BLKSZ * NR_BLKS)) "$TESTDIR/bigfile" 2>&1)"
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echo "${out}" | grep -q "No space left on device" || echo "CoW should have failed with ENOSPC"
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echo "${out}" >> "$seqres.full" 2>&1
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echo "${out}"
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#filefrag -v $TESTDIR/bigfile
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#filefrag -v $TESTDIR/clonefile
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echo "Check scratch fs"
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umount "$SCRATCH_MNT"
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_check_scratch_fs
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# success, all done
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status=0
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exit
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