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>
92 lines
2.7 KiB
Bash
Executable File
92 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2018 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test 443
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#
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# Regression test for the XFS rmapbt based extent swap algorithm. The extent
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# swap algorithm for rmapbt=1 filesystems unmaps/remaps individual extents to
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# rectify the rmapbt for each extent swapped between inodes. If one of the
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# inodes happens to straddle the extent <-> btree format boundary (which can
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# vary depending on inode size), the unmap/remap sequence can bounce the inodes
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# back and forth between formats many times during the swap. Since extent ->
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# btree format conversion requires a block allocation, this can consume more
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# blocks than expected, lead to block reservation overrun and free space
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# accounting inconsistency.
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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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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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. ./common/filter
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. ./common/punch
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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 "punch-alternating"
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_require_xfs_io_command "falloc"
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_require_xfs_io_command "fpunch"
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_require_xfs_io_command "swapext"
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_scratch_mkfs | _filter_mkfs >> $seqres.full 2> $tmp.mkfs
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_scratch_mount
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# get fs block size
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. $tmp.mkfs
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file1=$SCRATCH_MNT/file1
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file2=$SCRATCH_MNT/file2
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# The goal is run an extent swap where one of the associated files has the
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# minimum number of extents to remain in btree format. First, create a couple
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# files with large enough extent counts (200 or so should be plenty) to ensure
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# btree format on the largest possible inode size filesystems.
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$XFS_IO_PROG -fc "falloc 0 $((400 * dbsize))" $file1
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$here/src/punch-alternating $file1
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$XFS_IO_PROG -fc "falloc 0 $((400 * dbsize))" $file2
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$here/src/punch-alternating $file2
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# Now run an extent swap at every possible extent count down to 0. Depending on
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# inode size, one of these swaps will cover the boundary case between extent and
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# btree format.
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for i in $(seq 1 2 399); do
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# punch one extent from the tmpfile and swap
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$XFS_IO_PROG -c "fpunch $((i * dbsize)) $dbsize" $file2
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$XFS_IO_PROG -c "swapext $file2" $file1
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# punch the same extent from the old fork (now in file2) to resync the
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# extent counts and repeat
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$XFS_IO_PROG -c "fpunch $((i * dbsize)) $dbsize" $file2
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done
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# sanity check that no extents are left over
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$XFS_IO_PROG -c "fiemap" $file1 | _filter_fiemap
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$XFS_IO_PROG -c "fiemap" $file2 | _filter_fiemap
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# failure results in fs corruption and possible assert failure
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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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