#! /bin/bash # SPDX-License-Identifier: GPL-2.0 # Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved. # # FS QA Test 215 # # Test that reading corrupted files would correctly increment device status # counters. This is fixed by the following linux kernel commit: # 814723e0a55a ("btrfs: increment device corruption error in case of checksum error") # . ./common/preamble _begin_fstest auto quick read_repair . ./common/filter get_physical() { $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ grep $1 -A2 | \ $AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /0/) { print \$6 }" } _supported_fs btrfs _require_scratch # No data checksums for NOCOW case, so can't detect corruption and repair data. _require_btrfs_no_nodatacow # Overwriting data is forbidden on a zoned block device _require_non_zoned_device $SCRATCH_DEV _scratch_mkfs > /dev/null # disable freespace inode to ensure file is the first thing in the data # blobk group _scratch_mount $(_btrfs_no_v1_cache_opt) pagesize=$(_get_page_size) blocksize=$(_get_block_size $SCRATCH_MNT) # For subpage case, since we still do read in full page size, if have 8 corrupted # sectors in one page, then even we just try to read one sector of that page, # all 8 corruption will be reported. # So here we chose the filesize using page size. filesize=$((8*$pagesize)) if [ $blocksize -le $pagesize ]; then sectors_per_page=$(($pagesize / $blocksize)) else # We don't support multi-page sectorsize yet _notrun "this test doesn't support sectorsize $blocksize with page size $pagesize yet" fi uuid=$(findmnt -n -o UUID "$SCRATCH_MNT") if [ ! -e /sys/fs/btrfs/$uuid/bdi ]; then _notrun "bdi link not found" fi #create an 8 block file $XFS_IO_PROG -d -f -c "pwrite -S 0xbb -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null logical_extent=$(_btrfs_get_first_logical $SCRATCH_MNT/foobar) physical_extent=$(get_physical $logical_extent) echo "logical = $logical_extent physical=$physical_extent" >> $seqres.full # corrupt first 4 blocks of file _scratch_unmount $XFS_IO_PROG -d -c "pwrite -S 0xaa -b $pagesize $physical_extent $((4 * $pagesize))" $SCRATCH_DEV > /dev/null _scratch_mount # disable readahead to avoid skewing the counter echo 0 > /sys/fs/btrfs/$uuid/bdi/read_ahead_kb # buffered reads whould result in 2 * sectors_per_page errors since readahead code always submits # at least 1 page worth of IO and it will be counted as error(s) as well $XFS_IO_PROG -c "pread -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null 2>&1 errs=$($BTRFS_UTIL_PROG device stats $SCRATCH_DEV | $AWK_PROG '/corruption_errs/ { print $2 }') if [ $errs -ne $((2 * $sectors_per_page)) ]; then _fail "Errors: $errs expected: 2" fi # DIO does check every sector $XFS_IO_PROG -d -c "pread -b $filesize 0 $filesize" "$SCRATCH_MNT/foobar" > /dev/null 2>&1 errs=$($BTRFS_UTIL_PROG device stats $SCRATCH_DEV | $AWK_PROG '/corruption_errs/ { print $2 }') if [ $errs -ne $((6 * $sectors_per_page)) ]; then _fail "Errors: $errs expected: 6" fi # success, all done echo "Silence is golden" status=0 exit