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https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Christoph Hellwig
09e94f84d9
The always_cow mode can't usefull preallocate space gіven that it always has to write out of place, and thus will reject falloc or ioctl calls to preallocate space in a file. Add explicit checks for preallocation support in various XFS-specific tests to support this. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
119 lines
3.4 KiB
Bash
Executable File
119 lines
3.4 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
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#
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# FS QA Test No. 231
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#
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# Test recovery of unused CoW reservations:
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# - Create two reflinked files. Set extsz hint on second file.
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# - Dirty a single byte on a number of CoW reservations in the second file.
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# - Fsync to flush out the dirty pages.
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# - Wait for the reclaim to run.
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# - Write more and see how bad fragmentation is.
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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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echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
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rm -rf $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_os Linux
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_supported_fs xfs
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_require_scratch_reflink
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_require_cp_reflink
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_require_xfs_io_command "cowextsize"
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_require_xfs_io_command "falloc"
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_require_xfs_io_command "fiemap"
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old_cow_lifetime=$(cat /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime)
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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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mkdir $testdir
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blksz=65536
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nr=64
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filesize=$((blksz * nr))
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bufnr=2
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bufsize=$((blksz * bufnr))
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_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
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real_blksz=$(_get_block_size $testdir)
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internal_blks=$((filesize / real_blksz))
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echo "Create the original files"
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$XFS_IO_PROG -c "cowextsize $bufsize" $testdir
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$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file2.chk >> $seqres.full
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_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
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_scratch_cycle_mount
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echo "Compare files"
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md5sum $testdir/file1 | _filter_scratch
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md5sum $testdir/file2 | _filter_scratch
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md5sum $testdir/file2.chk | _filter_scratch
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echo "CoW and leave leftovers"
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echo 2 > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
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seq 2 2 $((nr - 1)) | while read f; do
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$XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" $testdir/file2 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" $testdir/file2.chk >> $seqres.full
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done
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sync
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echo "Wait for CoW expiration"
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sleep 3
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echo "Allocate free space"
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for i in $(seq 1 32); do
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$XFS_IO_PROG -f -c "falloc 0 1" $testdir/junk.$i >> $seqres.full
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done
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$XFS_IO_PROG -f -c "falloc 0 $filesize" $testdir/junk >> $seqres.full
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echo "CoW and leave leftovers"
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echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
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seq 2 2 $((nr - 1)) | while read f; do
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$XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f)) 1" $testdir/file2 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f)) 1" $testdir/file2.chk >> $seqres.full
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done
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sync
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echo "Compare files"
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md5sum $testdir/file1 | _filter_scratch
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md5sum $testdir/file2 | _filter_scratch
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md5sum $testdir/file2.chk | _filter_scratch
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echo "Check extent counts"
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old_extents=$(_count_extents $testdir/file1)
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new_extents=$(_count_extents $testdir/file2)
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echo "old extents: $old_extents" >> $seqres.full
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echo "new extents: $new_extents" >> $seqres.full
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echo "maximum extents: $internal_blks" >> $seqres.full
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test $new_extents -le $((3 * nr / bufnr)) || echo "file2 more fragmented than expected"
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# success, all done
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status=0
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exit
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