2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved.
7 # Test that reading corrupted files would correctly increment device status
8 # counters. This is fixed by the following linux kernel commit:
9 # btrfs: Increment device corruption error in case of checksum error
12 seqres=$RESULT_DIR/$seq
13 echo "QA output created by $seq"
17 status=1 # failure is the default!
18 trap "_cleanup; exit \$status" 0 1 2 3 15
26 # get standard environment, filters and checks
30 # remove previous $seqres.full before test
33 # real QA test starts here
36 $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
38 $AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /0/) { print \$6 }"
41 # Modify as appropriate.
45 _scratch_mkfs > /dev/null
46 # disable freespace inode to ensure file is the first thing in the data
48 _scratch_mount -o nospace_cache
50 blocksize=$(_get_block_size $SCRATCH_MNT)
51 filesize=$((8*$blocksize))
52 uuid=$(findmnt -n -o UUID "$SCRATCH_MNT")
54 if [ ! -e /sys/fs/btrfs/$uuid/bdi ]; then
55 _notrun "bdi link not found"
58 #create an 8 block file
59 $XFS_IO_PROG -d -f -c "pwrite -S 0xbb -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null
61 logical_extent=$($FILEFRAG_PROG -v "$SCRATCH_MNT/foobar" | _filter_filefrag | cut -d '#' -f 1)
62 physical_extent=$(get_physical $logical_extent)
64 echo "logical = $logical_extent physical=$physical_extent" >> $seqres.full
66 # corrupt first 4 blocks of file
68 $XFS_IO_PROG -d -c "pwrite -S 0xaa -b $blocksize $physical_extent $((4*$blocksize))" $SCRATCH_DEV > /dev/null
71 # disable readahead to avoid skewing the counter
72 echo 0 > /sys/fs/btrfs/$uuid/bdi/read_ahead_kb
74 # buffered reads whould result in a single error since the read is done
76 $XFS_IO_PROG -c "pread -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null 2>&1
77 errs=$($BTRFS_UTIL_PROG device stats $SCRATCH_DEV | awk '/corruption_errs/ { print $2 }')
78 if [ $errs -ne 1 ]; then
79 _fail "Errors: $errs expected: 1"
82 # DIO does check every sector
83 $XFS_IO_PROG -d -c "pread -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null 2>&1
84 errs=$($BTRFS_UTIL_PROG device stats $SCRATCH_DEV | awk '/corruption_errs/ { print $2 }')
85 if [ $errs -ne 5 ]; then
86 _fail "Errors: $errs expected: 1"
90 echo "Silence is golden"