On Tue, Aug 17, 2021 at 04:53:25PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
>
> generic/475, but we're running fsstress on a disk image inside the
> scratch filesystem
>
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
Good to me, thanks for this helpful test case. Just one question,
is it better to use xfs_metadump with "-o" option by default?
Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx>
> common/rc | 20 +++++++
> tests/generic/725 | 136 +++++++++++++++++++++++++++++++++++++++++++++++++
> tests/generic/725.out | 2 +
> 3 files changed, 158 insertions(+)
> create mode 100755 tests/generic/725
> create mode 100644 tests/generic/725.out
>
>
> diff --git a/common/rc b/common/rc
> index 84757fc1..473bfb0a 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -631,6 +631,26 @@ _ext4_metadump()
> $DUMP_COMPRESSOR -f "$dumpfile" &>> "$seqres.full"
> }
>
> +# Capture the metadata of a filesystem in a dump file for offline analysis
> +_metadump_dev() {
> + local device="$1"
> + local dumpfile="$2"
> + local compressopt="$3"
> +
> + case "$FSTYP" in
> + ext*)
> + _ext4_metadump $device $dumpfile $compressopt
> + ;;
> + xfs)
> + _xfs_metadump $dumpfile $device none $compressopt
> + ;;
> + *)
> + echo "Don't know how to metadump $FSTYP"
> + return 1
> + ;;
> + esac
> +}
> +
> _test_mkfs()
> {
> case $FSTYP in
> diff --git a/tests/generic/725 b/tests/generic/725
> new file mode 100755
> index 00000000..ac008fdb
> --- /dev/null
> +++ b/tests/generic/725
> @@ -0,0 +1,136 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2021 Oracle, Inc. All Rights Reserved.
> +#
> +# FS QA Test No. 725
> +#
> +# Test nested log recovery with repeated (simulated) disk failures. We kick
> +# off fsstress on a loopback filesystem mounted on the scratch fs, then switch
> +# out the underlying scratch device with dm-error to see what happens when the
> +# disk goes down. Having taken down both fses in this manner, remount them and
> +# repeat. This test simulates VM hosts crashing to try to shake out CoW bugs
> +# in writeback on the host that cause VM guests to fail to recover.
> +#
> +. ./common/preamble
> +_begin_fstest shutdown auto log metadata eio recoveryloop
> +
> +_cleanup()
> +{
> + cd /
> + $KILLALL_PROG -9 fsstress > /dev/null 2>&1
> + wait
> + if [ -n "$loopmnt" ]; then
> + $UMOUNT_PROG $loopmnt 2>/dev/null
> + rm -r -f $loopmnt
> + fi
> + rm -f $tmp.*
> + _dmerror_unmount
> + _dmerror_cleanup
> +}
> +
> +# Import common functions.
> +. ./common/dmerror
> +. ./common/reflink
> +
> +# Modify as appropriate.
> +_supported_fs generic
> +
> +_require_scratch_reflink
> +_require_cp_reflink
> +_require_dm_target error
> +_require_command "$KILLALL_PROG" "killall"
> +
> +echo "Silence is golden."
> +
> +_scratch_mkfs >> $seqres.full 2>&1
> +_require_metadata_journaling $SCRATCH_DEV
> +_dmerror_init
> +_dmerror_mount
> +
> +# Create a fs image consuming 1/3 of the scratch fs
> +scratch_freesp_bytes=$(_get_available_space $SCRATCH_MNT)
> +loopimg_bytes=$((scratch_freesp_bytes / 3))
> +
> +loopimg=$SCRATCH_MNT/testfs
> +truncate -s $loopimg_bytes $loopimg
> +_mkfs_dev $loopimg
> +
> +loopmnt=$tmp.mount
> +mkdir -p $loopmnt
> +
> +scratch_aliveflag=$tmp.runsnap
> +snap_aliveflag=$tmp.snapping
> +
> +snap_loop_fs() {
> + touch "$snap_aliveflag"
> + while [ -e "$scratch_aliveflag" ]; do
> + rm -f $loopimg.a
> + _cp_reflink $loopimg $loopimg.a
> + sleep 1
> + done
> + rm -f "$snap_aliveflag"
> +}
> +
> +fsstress=($FSSTRESS_PROG $FSSTRESS_AVOID -d "$loopmnt" -n 999999 -p "$((LOAD_FACTOR * 4))")
> +
> +for i in $(seq 1 $((25 * TIME_FACTOR)) ); do
> + touch $scratch_aliveflag
> + snap_loop_fs >> $seqres.full 2>&1 &
> +
> + if ! _mount $loopimg $loopmnt -o loop; then
> + rm -f $scratch_aliveflag
> + _metadump_dev $loopimg $seqres.loop.$i.md
> + _fail "iteration $i loopimg mount failed"
> + break
> + fi
> +
> + ("${fsstress[@]}" >> $seqres.full &) > /dev/null 2>&1
> +
> + # purposely include 0 second sleeps to test shutdown immediately after
> + # recovery
> + sleep $((RANDOM % (3 * TIME_FACTOR) ))
> + rm -f $scratch_aliveflag
> +
> + # This test aims to simulate sudden disk failure, which means that we
> + # do not want to quiesce the filesystem or otherwise give it a chance
> + # to flush its logs. Therefore we want to call dmsetup with the
> + # --nolockfs parameter; to make this happen we must call the load
> + # error table helper *without* 'lockfs'.
> + _dmerror_load_error_table
> +
> + ps -e | grep fsstress > /dev/null 2>&1
> + while [ $? -eq 0 ]; do
> + $KILLALL_PROG -9 fsstress > /dev/null 2>&1
> + wait > /dev/null 2>&1
> + ps -e | grep fsstress > /dev/null 2>&1
> + done
> + for ((i = 0; i < 10; i++)); do
> + test -e "$snap_aliveflag" || break
> + sleep 1
> + done
> +
> + # Mount again to replay log after loading working table, so we have a
> + # consistent fs after test.
> + $UMOUNT_PROG $loopmnt
> + _dmerror_unmount || _fail "iteration $i scratch unmount failed"
> + _dmerror_load_working_table
> + if ! _dmerror_mount; then
> + _metadump_dev $DMERROR_DEV $seqres.scratch.$i.md
> + _fail "iteration $i scratch mount failed"
> + fi
> +done
> +
> +# Make sure the fs image file is ok
> +if [ -f "$loopimg" ]; then
> + if _mount $loopimg $loopmnt -o loop; then
> + $UMOUNT_PROG $loopmnt &> /dev/null
> + else
> + _metadump_dev $DMERROR_DEV $seqres.scratch.final.md
> + echo "final scratch mount failed"
> + fi
> + SCRATCH_RTDEV= SCRATCH_LOGDEV= _check_scratch_fs $loopimg
> +fi
> +
> +# success, all done; let the test harness check the scratch fs
> +status=0
> +exit
> diff --git a/tests/generic/725.out b/tests/generic/725.out
> new file mode 100644
> index 00000000..ed73a9fc
> --- /dev/null
> +++ b/tests/generic/725.out
> @@ -0,0 +1,2 @@
> +QA output created by 725
> +Silence is golden.
>
