mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Zhihao Cheng
b7cecbea22
Calling src/<file> without path '$here' may cause the problem that
the file cannot be found.
For example, Running generic/192 with overlayfs(Let ubifs as base
fs) yields the following output:
generic/192 - output mismatch
QA output created by 192
sleep for 5 seconds
test
+./common/rc: line 316: src/t_dir_type: No such file or directory
delta1 is in range
delta2 is in range
...
When the use case fails, the call stack in generic/192 is:
local unknowns=$(src/t_dir_type $dir u | wc -l) common/rc
_supports_filetype common/rc
_overlay_mount common/overlay
_overlay_test_mount common/overlay
_test_mount common/rc
_test_cycle_mount generic/192
Before _test_cycle_mount() being invoked, generic/192 executed 'cd
/' to change work dir from 'xfstests-dev' to '/', so src/t_dir_type
was not found.
[Eryu: some tests run src/<file> as regular user, don't add $here
prefix in such case, as a regular user may have no search permission
on $here]
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
81 lines
2.3 KiB
Bash
Executable File
81 lines
2.3 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017-2019 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test No. 524
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#
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# Test XFS page writeback code for races with the cached file mapping. XFS
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# caches the file -> block mapping for a full extent once it is initially looked
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# up. The cached mapping is used for all subsequent pages in the same writeback
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# cycle that cover the associated extent. Under certain conditions, it is
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# possible for concurrent operations on the file to invalidate the cached
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# mapping without the knowledge of writeback. Writeback ends up sending I/O to a
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# partly stale mapping and potentially leaving delalloc blocks in the current
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# mapping unconverted.
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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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here=`pwd`
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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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_require_test_program "feature"
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_require_xfs_io_command "sync_range"
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_scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed"
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_scratch_mount
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file=$SCRATCH_MNT/file
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filesize=$((1024 * 1024 * 32))
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pagesize=`$here/src/feature -s`
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truncsize=$((filesize - pagesize))
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for i in $(seq 0 15); do
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# Truncate the file and fsync to persist the final size on-disk. This is
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# required so the subsequent truncate will not wait on writeback.
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$XFS_IO_PROG -fc "truncate 0" $file
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$XFS_IO_PROG -c "truncate $filesize" -c fsync $file
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# create a small enough delalloc extent to likely be contiguous
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$XFS_IO_PROG -c "pwrite 0 $filesize" $file >> $seqres.full 2>&1
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# Start writeback and a racing truncate and rewrite of the final page.
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$XFS_IO_PROG -c "sync_range -w 0 0" $file &
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sync_pid=$!
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$XFS_IO_PROG -c "truncate $truncsize" \
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-c "pwrite $truncsize $pagesize" $file >> $seqres.full 2>&1
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# If the test fails, the most likely outcome is an sb_fdblocks mismatch
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# and/or an associated delalloc assert failure on inode reclaim. Cycle
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# the mount to trigger detection.
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wait $sync_pid
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_scratch_cycle_mount
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done
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echo Silence is golden
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# success, all done
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status=0
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exit
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