| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved. |
| # |
| # FS QA Test No. 232 |
| # |
| # Test non-recovery of unused CoW reservations for dirty files: |
| # - Create two reflinked files. Set extsz hint on second file. |
| # - Dirty a single byte on a number of CoW reservations in the second file. |
| # - Fsync to flush out the dirty pages. |
| # - Dirty a single byte anywhere in the second file. |
| # - Wait for the reclaim to run. |
| # - Write more and see how bad fragmentation is. |
| # |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| test -n "$old_cowgc_interval" && \ |
| _xfs_set_cowgc_interval $old_cowgc_interval |
| rm -rf $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_fs xfs |
| _require_xfs_io_command "cowextsize" |
| _require_scratch_reflink |
| _require_cp_reflink |
| _require_xfs_io_command "falloc" |
| _require_xfs_io_command "fiemap" |
| |
| old_cowgc_interval=$(_xfs_get_cowgc_interval) |
| |
| rm -f $seqres.full |
| |
| echo "Format and mount" |
| _scratch_mkfs > $seqres.full 2>&1 |
| _scratch_mount >> $seqres.full 2>&1 |
| |
| testdir=$SCRATCH_MNT/test-$seq |
| mkdir $testdir |
| |
| blksz=65536 |
| nr=64 |
| filesize=$((blksz * nr)) |
| bufnr=2 |
| bufsize=$((blksz * bufnr)) |
| |
| _require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4)) |
| real_blksz=$(_get_block_size $testdir) |
| internal_blks=$((filesize / real_blksz)) |
| |
| echo "Create the original files" |
| $XFS_IO_PROG -c "cowextsize $bufsize" $testdir |
| $XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full |
| $XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file2.chk >> $seqres.full |
| _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full |
| _scratch_cycle_mount |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file2.chk | _filter_scratch |
| |
| echo "CoW and leave leftovers" |
| _xfs_set_cowgc_interval 2 |
| seq 2 2 $((nr - 1)) | while read f; do |
| $XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" $testdir/file2 >> $seqres.full |
| $XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" $testdir/file2.chk >> $seqres.full |
| done |
| sync |
| |
| echo "Wait for CoW expiration" |
| $XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * 2)) 1" $testdir/file2 >> $seqres.full |
| sleep 3 |
| |
| echo "Allocate free space" |
| for i in $(seq 1 32); do |
| $XFS_IO_PROG -f -c "falloc 0 1" $testdir/junk.$i >> $seqres.full |
| done |
| $XFS_IO_PROG -f -c "falloc 0 $filesize" $testdir/junk >> $seqres.full |
| |
| echo "CoW and leave leftovers" |
| _xfs_set_cowgc_interval $old_cowgc_interval |
| seq 2 2 $((nr - 1)) | while read f; do |
| $XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f)) 1" $testdir/file2 >> $seqres.full |
| $XFS_IO_PROG -f -c "pwrite -S 0x63 $((blksz * f)) 1" $testdir/file2.chk >> $seqres.full |
| done |
| sync |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file2.chk | _filter_scratch |
| |
| echo "Check extent counts" |
| old_extents=$(_count_extents $testdir/file1) |
| new_extents=$(_count_extents $testdir/file2) |
| |
| echo "old extents: $old_extents" >> $seqres.full |
| echo "new extents: $new_extents" >> $seqres.full |
| echo "maximum extents: $internal_blks" >> $seqres.full |
| test $new_extents -le $((2 * nr / bufnr)) || echo "file2 more fragmented than expected" |
| |
| # success, all done |
| status=0 |
| exit |