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https://github.com/linux-apfs/apfstests.git
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Josef Bacik
5956d1dd65
We had a regression where we were not copying csums properly when balancing a prealloc extent. Unfortunately the way this showed up the most was with the csum simply missing, which doesn't result in an error to userspace. So I've copied what generic/310 does and check dmesg for csum errors when the test starts and then compare that count to the csum errors after the test finishes to see if there was a problem. This approach caught the error without my fix, and then passed fine with my fix in place but with the previous errors still in dmesg. Thanks, [rjohnston: changed test number to 13] Signed-off-by: Josef Bacik <jbacik@fusionio.com> Reviewed-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Rich Johnston <rjohnston@sgi.com>
88 lines
2.5 KiB
Bash
88 lines
2.5 KiB
Bash
#! /bin/bash
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# FS QA Test No. btrfs/013
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#
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# Regression test for balance with prealloc extents. This checks to make sure
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# we are balacing prealloc'ed extents properly by making sure we don't have any
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# csum errors. Unfortunately this manifests itself with no csum which means
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# userspace doesn't get an error when reading the file back so we have to grok
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# dmesg to see if there was a csum error.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2013 Fusion IO. 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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#
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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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_cleanup()
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{
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rm -f $tmp.*
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}
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trap "_cleanup ; exit \$status" 0 1 2 3 15
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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 btrfs
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_supported_os Linux
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_require_scratch
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rm -f $seqres.full
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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nr_csum_no_found=$(dmesg | grep -c "no csum found")
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nr_csum_failed=$(dmesg | grep -c "csum failed")
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_check_csum_error()
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{
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new_csum_no_found=$(dmesg | grep -c "no csum found")
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new_csum_failed=$(dmesg | grep -c "csum failed")
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if [ $nr_csum_no_found -eq $new_csum_no_found -a \
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$nr_csum_failed -eq $new_csum_failed ]; then
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return 0
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fi
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return 1
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}
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$XFS_IO_PROG -f -c "falloc 0 1M" -c "pwrite 16k 8k" -c "fsync" \
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$SCRATCH_MNT/foo > $seqres.full 2>&1
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$BTRFS_UTIL_PROG fi ba $SCRATCH_MNT >> $seqres.full 2>&1 || \
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_fail "balance failed"
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_scratch_unmount
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_scratch_mount
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$XFS_IO_PROG -c "pread 0 1M" $SCRATCH_MNT/foo >> $seqres.full 2>&1 || \
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_fail "pread failed"
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# This sucks but unfortunately it is the only way to be sure something didn't go
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# wrong.
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_check_csum_error || _fail "csum detected, please check dmesg"
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echo "Silence is golden"
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status=0 ; exit
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