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>
---
common/rc | 24 +++++++++
tests/generic/725 | 136 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/725.out | 2 +
3 files changed, 162 insertions(+)
create mode 100755 tests/generic/725
create mode 100644 tests/generic/725.out
diff --git a/common/rc b/common/rc
index 46b6b220..05c87332 100644
--- a/common/rc
+++ b/common/rc
@@ -631,6 +631,30 @@ _ext4_metadump()
$DUMP_COMPRESSOR -f "$dumpfile" &>> "$seqres.full"
}
+# Capture the metadata of a filesystem in a dump file for offline analysis.
+# This is not supported by all filesystem types, so this function should only
+# be used after a test has already failed.
+_metadump_dev() {
+ local device="$1"
+ local dumpfile="$2"
+ local compressopt="$3"
+
+ test "$DUMP_CORRUPT_FS" = 1 || return 0
+
+ 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.
