mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Qu Wenruo
3651c38e0b
Some test cases (AFAIK, btrfs RAID recovery test cases) read out
certain location to verify its data.
Such read is mostly OK, but the golden output contains the on-disk
offset, which can differ due to underlying chunk change. (This time
is mkfs chunk layout change for btrfs)
So introduce macro _filter_xfs_io_offset to filter out the offset part
wrote 65536/65536 bytes at offset 136708096
^^^^^^^^^^^^^^^^^^^^
And offset from "pread -v"
08260000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
^^^^^^^^^
Only btrfs/14[0-3] are affected.
Reported-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
147 lines
4.3 KiB
Bash
Executable File
147 lines
4.3 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 142
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#
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# Regression test for btrfs DIO read's repair during read without checksum.
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#
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# Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks")
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# introduced this regression. It'd cause 'Segmentation fault' error.
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#
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# The upstream fix is
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# commit 97bf5a5589aa ("Btrfs: fix segmentation fault when doing dio read")
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Liu Bo. 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/filter
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs btrfs
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_supported_os Linux
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_require_fail_make_request
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_require_scratch_dev_pool 2
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_require_btrfs_command inspect-internal dump-tree
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_require_command "$FILEFRAG_PROG" filefrag
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get_physical()
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{
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# $1 is logical address
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# print chunk tree and find devid 2 which is $SCRATCH_DEV
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }'
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}
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SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV`
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start_fail()
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{
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echo 100 > $DEBUGFS_MNT/fail_make_request/probability
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echo 2 > $DEBUGFS_MNT/fail_make_request/times
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echo 1 > $DEBUGFS_MNT/fail_make_request/task-filter
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echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
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echo 1 > $SYSFS_BDEV/make-it-fail
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}
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stop_fail()
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{
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echo 0 > $DEBUGFS_MNT/fail_make_request/probability
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echo 0 > $DEBUGFS_MNT/fail_make_request/times
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echo 0 > $DEBUGFS_MNT/fail_make_request/task-filter
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echo 0 > $SYSFS_BDEV/make-it-fail
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}
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_scratch_dev_pool_get 2
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# step 1, create a raid1 btrfs which contains one 128k file.
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echo "step 1......mkfs.btrfs" >>$seqres.full
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mkfs_opts="-d raid1 -b 1G"
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_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
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# -o nospace_cache makes sure data is written to the start position of the data
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# chunk
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_scratch_mount -o nospace_cache,nodatasum
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$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
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_filter_xfs_io_offset
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# step 2, corrupt the first 64k of one copy (on SCRATCH_DEV which is the first
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# one in $SCRATCH_DEV_POOL
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echo "step 2......corrupt file extent" >>$seqres.full
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${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
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logical_in_btrfs=`${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
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physical_on_scratch=`get_physical ${logical_in_btrfs}`
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_scratch_unmount
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV |\
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_filter_xfs_io_offset
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_scratch_mount -o nospace_cache
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# step 3, 128k dio read (this read can repair bad copy)
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echo "step 3......repair the bad copy" >>$seqres.full
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# since raid1 consists of two copies, and the bad copy was put on stripe #1
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# while the good copy lies on stripe #0, the bad copy only gets access when the
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# reader's pid % 2 == 1 is true
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start_fail
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while [[ -z ${result} ]]; do
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# enable task-filter only fails the following dio read so the repair is
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# supposed to work.
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result=$(bash -c "
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if [[ \$((\$\$ % 2)) -eq 1 ]]; then
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echo 1 > /proc/\$\$/make-it-fail
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exec $XFS_IO_PROG -d -c \"pread -b 128K 0 128K\" \"$SCRATCH_MNT/foobar\"
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fi");
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done
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stop_fail
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_scratch_unmount
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# check if the repair works
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$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV |\
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_filter_xfs_io_offset
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_scratch_dev_pool_put
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# success, all done
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status=0
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exit
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