| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2014 Red Hat, Inc. All Rights Reserved. |
| # |
| # FS QA Test No. generic/030 |
| # |
| # Test mapped writes against remap+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. |
| # |
| 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 $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| |
| # Modify as appropriate. |
| _supported_fs generic |
| _require_scratch |
| _require_xfs_io_command "mremap" |
| |
| testfile=$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 5017k" `# truncate | |` \ |
| -c "pwrite -S 0x58 0 5017k" `# write |X...XXX|` \ |
| -c "mmap -rw 0 5017k" `# mmap | |` \ |
| -c "truncate 5020k" `# truncate up | |` \ |
| -c "mremap -m 5020k" `# mremap up | |` \ |
| -c "mwrite -S 0x57 5017k 3k" `# mwrite | WWWWWWWWWWWWWWWW|` \ |
| -c "mremap 5017k " `# mremap dn | |` \ |
| -c "truncate 5017k" `# mremap dn | |` \ |
| -c "truncate 5020k" `# truncate up | |` \ |
| -c "mremap -m 5020k" `# mremap up | |` \ |
| -c "mwrite -S 0x59 5017k 3k" `# mwrite | YYYYYYYYYYYYYYYY|` \ |
| -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 5017k" `# truncate | |` \ |
| -c "pwrite -S 0x58 0 5017k" `# write |X...XXX|` \ |
| -c "mmap -rw 0 5017k" `# mmap | |` \ |
| -c "truncate 5020k" `# truncate up | |` \ |
| -c "mremap -m 5020k" `# mremap up | |` \ |
| -c "mwrite -S 0x57 5017k 3k" `# mwrite | WWWWWWWWWWWWWWWW|` \ |
| -c "mremap 5017k " `# mremap dn | |` \ |
| -c "truncate 5017k" `# mremap dn | |` \ |
| -c "mwrite -S 0x5a 5016k 1k" `# mwrite | ZZZ |` \ |
| -c "truncate 5020k" `# truncate up | |` \ |
| -c "mremap -m 5020k" `# mremap up | |` \ |
| -c "mwrite -S 0x59 5017k 3k" `# mwrite | YYYYYYYYYYYYYYYY|` \ |
| -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 the first, but this time on unaligned byte |
| # boundaries rather than block boundaries. This mimics the exact mmap write |
| # patterns of the application that exposed the bug in the first place, and |
| # so is somewhat more complex and has repeated operations in it. |
| $XFS_IO_PROG -t -f \ |
| -c "truncate 5136912" \ |
| -c "pwrite -S 0x58 0 5136912" \ |
| -c "mmap -rw 0 5136912" \ |
| -c "mremap 5136912" \ |
| -c "truncate 5136912" \ |
| -c "truncate 5139720" \ |
| -c "mremap -m 5139720" \ |
| -c "mwrite -S 0 5136912 2808" \ |
| -c "mwrite -S 0 5136912 2808" \ |
| -c "mwrite -S 0 5136912 2808" \ |
| -c "mremap 5136912 " \ |
| -c "truncate 5136912" \ |
| -c "truncate 5139720" \ |
| -c "mremap -m 5139720" \ |
| -c "mwrite -S 0 5136912 2808" \ |
| -c "mwrite -S 0 5136912 2808" \ |
| -c "mwrite -S 0x59 5136912 2808" \ |
| -c "truncate 5140480" \ |
| -c "mremap 5140480" \ |
| -c "msync -s 0 5140480" \ |
| -c "mremap 5139720" \ |
| -c "munmap" \ |
| -c "close" \ |
| $testfile | _filter_xfs_io |
| |
| echo "==== Pre-Remount ===" |
| hexdump -C $testfile |
| _scratch_cycle_mount |
| echo "==== Post-Remount ==" |
| hexdump -C $testfile |
| |
| status=0 |
| exit |
| |