mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Eryu Guan
69eb6281a9
Previously _scratch_mount didn't check the mount status and most tests continue to run even if the mount failed (unless test checks for the mount status explicitly). This would result in running tests on the underlying filesystem (usually rootfs) and implicit test failures, and such failures can be annoying and are usually hard to debug. Now _fail test by default if _scratch_mount failed and introduce _try_scratch_mount for tests that need to check mount results themselves. Suggested-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
91 lines
2.6 KiB
Bash
Executable File
91 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 433
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#
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# Regression test for an XFS NULL xattr buffer problem during unlink. XFS had a
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# bug where the attr fork walk during file removal could go off the rails due to
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# a stale reference to content of a released buffer. Memory pressure could cause
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# this reference to point to free or reused memory and cause subsequent
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# attribute fork lookups to fail, return a NULL buffer and possibly crash.
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#
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# This test emulates this behavior using an error injection knob to explicitly
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# disable buffer LRU caching. This forces the attr walk to execute under
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# conditions where each buffer is immediately freed on release.
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#
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# Commit f35c5e10c6ed ("xfs: reinit btree pointer on attr tree inactivation
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# walk") fixed the bug.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Red Hat, Inc. All Rights Reserved.
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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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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/attr
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. ./common/inject
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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_xfs_io_error_injection buf_lru_ref
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_require_scratch
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_require_attrs
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_scratch_mkfs > $seqres.full 2>&1
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_scratch_mount
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file=$SCRATCH_MNT/testfile
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# create a bunch of xattrs to form a multi-level attr tree
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touch $file
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for i in $(seq 0 499); do
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$SETFATTR_PROG -n trusted.user.$i -v 0 $file
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done
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# cycle the mount to clear any buffer references
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_scratch_cycle_mount || _fail "cycle mount failure"
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# disable the lru cache and unlink the file
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_scratch_inject_error buf_lru_ref 1
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rm -f $file
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_scratch_inject_error buf_lru_ref 0
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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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