mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Qu Wenruo
996e263244
[BUG] With btrfs-progs v5.4, btrfs/140 and btrfs/141 will fail. [CAUSE] Both tests are testing re-silvering of RAID1, thus they need to corrupt on-disk data. This requires to do manual logical -> physical bytes mapping in the test case. However the test case itself uses too many hard coded helper to grab physical offset, which will change with mkfs.btrfs. [FIX] Use more flex helper, to get both devid and physical for such corruption. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
126 lines
3.2 KiB
Bash
Executable File
126 lines
3.2 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Liu Bo. All Rights Reserved.
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#
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# FS QA Test 141
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#
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# Regression test for btrfs buffered read's repair during read.
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#
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# Commit 20a7db8ab3f2 ("btrfs: add dummy callback for readpage_io_failed
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# and drop checks") introduced the regression.
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#
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# The upstream fix is
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# Commit 9d0d1c8b1c9d ("Btrfs: bring back repair during read")
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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 $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch_dev_pool 2
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_require_btrfs_command inspect-internal dump-tree
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_require_command "$FILEFRAG_PROG" filefrag
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get_physical()
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{
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$6 }"
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}
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get_devid()
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{
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$4 }"
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}
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get_device_path()
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{
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local devid=$1
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echo "$SCRATCH_DEV_POOL" | $AWK_PROG "{print \$$devid}"
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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
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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 $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
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physical=$(get_physical ${logical_in_btrfs} 1)
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devid=$(get_devid ${logical_in_btrfs} 1)
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devpath=$(get_device_path ${devid})
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_scratch_unmount
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echo " corrupt stripe #1, devid $devid devpath $devpath physical $physical" \
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>> $seqres.full
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" $devpath > /dev/null
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_scratch_mount
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# step 3, 128k buffered read (this read can repair bad copy)
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echo "step 3......repair the bad copy" >>$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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while true; do
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echo 3 > /proc/sys/vm/drop_caches
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$XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null &
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pid=$!
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wait
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[ $((pid % 2)) == 1 ] && break
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done
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_scratch_unmount
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# check if the repair works
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$XFS_IO_PROG -c "pread -v -b 512 $physical 512" $devpath |\
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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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