mirror of
https://github.com/linux-apfs/apfstests.git
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Dave Chinner
cf89aed924
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
92 lines
2.6 KiB
Bash
Executable File
92 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FSQA Test No. 098
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#
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# Test that after truncating a file into the middle of a hole causes the new
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# size of the file to be persisted after a clean unmount of the filesystem (or
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# after the inode is evicted). This is for the case where all the data following
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# the hole is not yet durably persisted, that is, that data is only present in
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# the page cache.
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#
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# This test is motivated by an issue found in btrfs.
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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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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_scratch
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# This test was motivated by an issue found in btrfs when the btrfs no-holes
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# feature is enabled (introduced in kernel 3.14). So enable the feature if the
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# fs being tested is btrfs.
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if [ $FSTYP == "btrfs" ]; then
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_require_btrfs_fs_feature "no_holes"
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_require_btrfs_mkfs_feature "no-holes"
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MKFS_OPTIONS="$MKFS_OPTIONS -O no-holes"
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fi
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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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workout()
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{
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local need_sync=$1
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# Create our test file with some data and durably persist it.
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$XFS_IO_PROG -t -f -c "pwrite -S 0xaa 0 128K" $SCRATCH_MNT/foo | _filter_xfs_io
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sync
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# Append some data to the file, increasing its size, and leave a hole between
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# the old size and the start offset if the following write. So our file gets
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# a hole in the range [128Kb, 256Kb[.
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$XFS_IO_PROG -c "pwrite -S 0xbb 256K 32K" $SCRATCH_MNT/foo | _filter_xfs_io
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# This 'sync' is to flush file extent on disk and update on-disk inode size.
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# This is required to trigger a bug in btrfs truncate where it updates on-disk
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# inode size incorrectly.
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if [ $need_sync -eq 1 ]; then
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sync
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fi
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# Now truncate our file to a smaller size that is in the middle of the hole we
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# previously created.
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# If we don't flush dirty page cache above, on most truncate
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# implementations the data we appended before gets discarded from
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# memory (with truncate_setsize()) and never ends up being written to
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# disk.
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$XFS_IO_PROG -c "truncate 160K" $SCRATCH_MNT/foo
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_scratch_cycle_mount
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# We expect to see a file with a size of 160Kb, with the first 128Kb of data all
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# having the value 0xaa and the remaining 32Kb of data all having the value 0x00
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echo "File content after remount:"
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od -t x1 $SCRATCH_MNT/foo
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}
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workout 0
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# flush after each write
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workout 1
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status=0
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exit
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