| #! /bin/bash |
| # FS QA Test No. generic/029 |
| # |
| # Test mapped writes against truncate down/up to ensure we get the data |
| # correctly written. This can expose data corruption bugs on filesystems where |
| # the block size is smaller than the page size. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2014 Red Hat, Inc. 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 -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| |
| # Modify as appropriate. |
| _supported_fs generic |
| _supported_os Linux |
| _require_scratch |
| |
| testfile=$SCRATCH_MNT/testfile |
| |
| _scratch_mkfs > /dev/null 2>&1 |
| _scratch_mount |
| |
| # first case is just truncate down/truncate up to check that the mapped |
| # write after the truncate up is correctly handled. |
| $XFS_IO_PROG -t -f \ |
| -c "truncate 5120" `# truncate | |` \ |
| -c "pwrite -S 0x58 0 5120" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \ |
| -c "mmap -rw 0 5120" `# mmap | |` \ |
| -c "mwrite -S 0x5a 2048 3072" `# mwrite | ZZZZZZZZZZZZZZ|` \ |
| -c "truncate 2048" `# truncate dn | |` \ |
| -c "truncate 5120" `# truncate up | |` \ |
| -c "mwrite -S 0x59 2048 3072" `# mwrite | YYYYYYYYYYYYYY|` \ |
| -c "close" \ |
| $testfile | _filter_xfs_io |
| |
| echo "==== Pre-Remount ===" |
| hexdump -C $testfile |
| _scratch_cycle_mount |
| echo "==== Post-Remount ==" |
| hexdump -C $testfile |
| |
| rm -f $testfile |
| sync |
| |
| # second case is to do a mwrite between the truncate to a block on the |
| # same page we are truncating within the EOF. This checks that a mapped |
| # write between truncate down and truncate up a further mapped |
| # write to the same page into the new space doesn't result in data being lost. |
| $XFS_IO_PROG -t -f \ |
| -c "truncate 5120" `# truncate | |` \ |
| -c "pwrite -S 0x58 0 5120" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \ |
| -c "mmap -rw 0 5120" `# mmap | |` \ |
| -c "mwrite -S 0x5a 2048 3072" `# mwrite | ZZZZZZZZZZZZZZ|` \ |
| -c "truncate 2048" `# truncate dn | |` \ |
| -c "mwrite -S 0x57 1024 1024" `# mwrite | WWWWW |` \ |
| -c "truncate 5120" `# truncate up | |` \ |
| -c "mwrite -S 0x59 2048 3072" `# mwrite | YYYYYYYYYYYYYY|` \ |
| -c "close" \ |
| $testfile | _filter_xfs_io |
| |
| echo "==== Pre-Remount ===" |
| hexdump -C $testfile |
| _scratch_cycle_mount |
| echo "==== Post-Remount ==" |
| hexdump -C $testfile |
| |
| # third case is the same as second case, just with non-1k aligned offsets and |
| # sizes. |
| $XFS_IO_PROG -t -f \ |
| -c "truncate 5121" `# truncate | |` \ |
| -c "pwrite -S 0x58 0 5121" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \ |
| -c "mmap -rw 0 5121" `# mmap | |` \ |
| -c "mwrite -S 0x5a 2047 3071" `# mwrite | ZZZZZZZZZZZZZZ|` \ |
| -c "truncate 2047" `# truncate dn | |` \ |
| -c "mwrite -S 0x57 513 1025" `# mwrite | WWWWW |` \ |
| -c "truncate 5121" `# truncate up | |` \ |
| -c "mwrite -S 0x59 2047 3071" `# mwrite | YYYYYYYYYYYYYY|` \ |
| -c "close" \ |
| $testfile | _filter_xfs_io |
| |
| echo "==== Pre-Remount ===" |
| hexdump -C $testfile |
| _scratch_cycle_mount |
| echo "==== Post-Remount ==" |
| hexdump -C $testfile |
| |
| status=0 |
| exit |
| |