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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Red Hat, Inc. All Rights Reserved.
#
# 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.
#
. ./common/preamble
_begin_fstest auto quick rw
# Import common functions.
. ./common/filter
# real QA test starts here
# Modify as appropriate.
_supported_fs generic
_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 $testfile
_scratch_cycle_mount
echo "==== Post-Remount =="
_hexdump $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 $testfile
_scratch_cycle_mount
echo "==== Post-Remount =="
_hexdump $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 $testfile
_scratch_cycle_mount
echo "==== Post-Remount =="
_hexdump $testfile
status=0
exit
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