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generic: test for number of bytes used by files after buffered writes
Test that a filesystem's implementation of the stat(2) system call reports correct values for the number of blocks allocated for a file when there are delayed allocations. This test is motivated by a bug in btrfs which is fixed by the following path for the linux kernel: "Btrfs: fix reported number of inode blocks" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Filipe Manana
Eryu Guan
Executable
+127
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#! /bin/bash
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# FS QA Test No. generic/422
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#
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# Test that a filesystem's implementation of the stat(2) system call reports
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# correct values for the number of blocks allocated for a file when there are
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# delayed allocations.
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
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# Author: Filipe Manana <fdmanana@suse.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_test
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_require_scratch
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_require_xfs_io_command "falloc -k"
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_require_odirect
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" $SCRATCH_MNT/foo1 | _filter_xfs_io
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$XFS_IO_PROG -f \
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-c "pwrite -S 0xaa 0 64K" \
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-c "truncate 128K" \
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$SCRATCH_MNT/foo2 | _filter_xfs_io
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$XFS_IO_PROG -f \
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-c "falloc -k 0 128K" \
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-c "pwrite -S 0xaa 0 64K" \
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$SCRATCH_MNT/foo3 | _filter_xfs_io
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touch $SCRATCH_MNT/foo4
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# Make sure everything done so far is durably persisted.
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sync
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# Now overwrite the extent of the first file.
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$XFS_IO_PROG -c "pwrite -S 0xff 0 64K" $SCRATCH_MNT/foo1 | _filter_xfs_io
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# Write to a hole of the second file.
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$XFS_IO_PROG -c "pwrite -S 0xff 64K 64K" $SCRATCH_MNT/foo2 | _filter_xfs_io
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# Write again to the same location, just to test that the fs will not account
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# the same write twice.
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$XFS_IO_PROG -c "pwrite -S 0x20 64K 64K" $SCRATCH_MNT/foo2 | _filter_xfs_io
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# Write beyond eof of the third file into the pre-allocated extent.
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$XFS_IO_PROG -c "pwrite -S 0xff 64K 64K" $SCRATCH_MNT/foo3 | _filter_xfs_io
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# Do a buffered write immediately followed by a direct IO write, without a
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# fsync in between, just to test that page invalidation does not lead to an
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# incorrect number of file blocks reported.
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$XFS_IO_PROG -c "pwrite -S 0xab 0 64K" $SCRATCH_MNT/foo4 | _filter_xfs_io
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$XFS_IO_PROG -d -c "pwrite -S 0xef 0 64K" $SCRATCH_MNT/foo4 | _filter_xfs_io
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echo
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echo "Before writeback"
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echo
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echo "Space used by file foo1:"
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du -h $SCRATCH_MNT/foo1 | _filter_scratch
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echo "Space used by file foo2:"
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du -h $SCRATCH_MNT/foo2 | _filter_scratch
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echo "Space used by file foo3:"
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du -h $SCRATCH_MNT/foo3 | _filter_scratch
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echo "Space used by file foo4:"
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du -h $SCRATCH_MNT/foo4 | _filter_scratch
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sync
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# We expect the same file sizes reported by 'du' after writeback finishes.
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echo
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echo "After writeback"
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echo
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echo "Space used by file foo1:"
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du -h $SCRATCH_MNT/foo1 | _filter_scratch
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echo "Space used by file foo2:"
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du -h $SCRATCH_MNT/foo2 | _filter_scratch
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echo "Space used by file foo3:"
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du -h $SCRATCH_MNT/foo3 | _filter_scratch
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echo "Space used by file foo4:"
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du -h $SCRATCH_MNT/foo4 | _filter_scratch
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status=0
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exit
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@@ -0,0 +1,41 @@
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QA output created by 422
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Before writeback
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Space used by file foo1:
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64K SCRATCH_MNT/foo1
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Space used by file foo2:
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128K SCRATCH_MNT/foo2
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Space used by file foo3:
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128K SCRATCH_MNT/foo3
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Space used by file foo4:
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64K SCRATCH_MNT/foo4
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After writeback
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Space used by file foo1:
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64K SCRATCH_MNT/foo1
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Space used by file foo2:
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128K SCRATCH_MNT/foo2
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Space used by file foo3:
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128K SCRATCH_MNT/foo3
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Space used by file foo4:
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64K SCRATCH_MNT/foo4
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@@ -424,3 +424,4 @@
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419 auto quick encrypt
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420 auto quick punch
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421 auto quick encrypt dangerous
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422 auto quick
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