| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2016 Red Hat Inc., All Rights Reserved. |
| # |
| # FS QA Test 338 |
| # |
| # Test I/O on dm error device. |
| # |
| # Motivated by an ext4 bug that crashes kernel on error path when trying to |
| # update atime. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick rw eio |
| |
| # Override the default cleanup function. |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| _dmerror_cleanup |
| } |
| |
| # Import common functions. |
| . ./common/filter |
| . ./common/dmerror |
| |
| _require_scratch_nocheck # fs went down with a dirty log, don't check it |
| _require_dm_target error |
| # If SCRATCH_DEV is not a valid block device, FSTYP cannot be mkfs'ed either |
| _require_block_device $SCRATCH_DEV |
| |
| echo "Silence is golden" |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _dmerror_init |
| |
| # Use strictatime mount option here to force atime updates, which could help |
| # trigger the NULL pointer dereference on ext4 more easily |
| _dmerror_mount "-o strictatime" |
| _dmerror_load_error_table |
| |
| # flush dmerror block device buffers and drop all caches, force reading from |
| # error device |
| blockdev --flushbufs $DMERROR_DEV |
| echo 3 > /proc/sys/vm/drop_caches |
| |
| # do some test I/O |
| ls -l $SCRATCH_MNT >>$seqres.full 2>&1 |
| $XFS_IO_PROG -fc "pwrite 0 1M" $SCRATCH_MNT/testfile >>$seqres.full 2>&1 |
| |
| # no panic no hang, success, all done |
| status=0 |
| exit |
