| #! /bin/bash |
| # FS QA Test No. 420 |
| # |
| # Test SEEK_HOLE/SEEK_DATA into a region that is marked CoW'd for |
| # speculative preallocation in the CoW fork and isn't backed by |
| # data fork extents. |
| # |
| # - Set a huge cowextsize hint. |
| # - Create a file "DD " (two data blocks, six hole blocks) |
| # - Reflink copy this file to a second file. |
| # - Write to the first block of the second file to create a single |
| # large CoW reservation covering the whole file. |
| # - Write to block 3, which should be a hole in the data fork. |
| # - Display the SEEK_HOLE/SEEK_DATA info for the second file to confirm |
| # that we see the data in blocks 0-1, the hole at block 2, the data |
| # at block 3, and the hole for the rest of the file. |
| # |
| # Basically we want to create a file with the following data/CoW forks: |
| # |
| # data: DD------ |
| # cow: dddddddd |
| # ^--^---------- these blocks are dirty |
| # |
| # And then check that SEEK_HOLE and SEEK_DATA actually find that second |
| # dirty block even though we've never had a data fork extent mapping the |
| # second dirty block. We need the huge cowextsize so that the hole |
| # area receives preallocation in the CoW fork. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2017, Oracle and/or its affiliates. All Rights Reserved. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| |
| 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 / |
| rm -rf $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_os Linux |
| _supported_fs xfs |
| _require_scratch_reflink |
| _require_cp_reflink |
| _require_xfs_io_command "cowextsize" |
| _require_xfs_io_command "fpunch" |
| |
| 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 $testdir |
| |
| blksz=65536 |
| nr=8 |
| filesize=$((blksz * nr)) |
| |
| echo "Create the original files" |
| $XFS_IO_PROG -c "cowextsize" $testdir >> $seqres.full |
| $XFS_IO_PROG -c "cowextsize $filesize" $testdir >> $seqres.full |
| $XFS_IO_PROG -c "cowextsize" $testdir >> $seqres.full |
| $XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((blksz * 2))" -c "truncate $filesize" -c "fpunch $((blksz * 2)) $((blksz * (nr - 2) ))" $testdir/file1 >> $seqres.full |
| _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full |
| $XFS_IO_PROG -f -c "pwrite -S 0 0 $filesize" -c "pwrite -S 0x61 0 $((blksz * 2))" $testdir/file3 >> $seqres.full |
| _scratch_cycle_mount |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file3 | _filter_scratch |
| |
| echo "CoW the shared part then write into the empty part" | tee -a $seqres.full |
| $XFS_IO_PROG -c "cowextsize" $testdir/file1 >> $seqres.full |
| $XFS_IO_PROG -c "cowextsize" $testdir/file2 >> $seqres.full |
| $XFS_IO_PROG -c "pwrite -S 0x63 0 $blksz" $testdir/file2 >> $seqres.full |
| $XFS_IO_PROG -c "pwrite -S 0x63 $((blksz * 3)) $blksz" $testdir/file2 >> $seqres.full |
| |
| $XFS_IO_PROG -c "pwrite -S 0x63 0 $blksz" $testdir/file3 >> $seqres.full |
| $XFS_IO_PROG -c "pwrite -S 0x63 $((blksz * 3)) $blksz" $testdir/file3 >> $seqres.full |
| |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file1 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file2 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file3 >> $seqres.full 2>&1 |
| |
| echo "Seek holes and data in file1" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file1 |
| echo "Seek holes and data in file2" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file2 |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file3 | _filter_scratch |
| |
| echo "sync filesystem" | tee -a $seqres.full |
| sync |
| |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file1 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file2 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file3 >> $seqres.full 2>&1 |
| |
| echo "Seek holes and data in file1" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file1 |
| echo "Seek holes and data in file2" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file2 |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file3 | _filter_scratch |
| |
| echo "Remount" | tee -a $seqres.full |
| _scratch_cycle_mount |
| |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file1 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file2 >> $seqres.full 2>&1 |
| $XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file3 >> $seqres.full 2>&1 |
| |
| echo "Seek holes and data in file1" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file1 |
| echo "Seek holes and data in file2" |
| $XFS_IO_PROG -c "seek -a -r 0" $testdir/file2 |
| |
| echo "Compare files" |
| md5sum $testdir/file1 | _filter_scratch |
| md5sum $testdir/file2 | _filter_scratch |
| md5sum $testdir/file3 | _filter_scratch |
| |
| # success, all done |
| status=0 |
| exit |