+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) 2021 Oracle. All Rights Reserved.
+#
+# FS QA Test No. 155
+#
+# Populate a filesystem with all types of metadata, then run repair with the
+# libxfs write failure trigger set to go after a single write. Check that the
+# injected error trips, causing repair to abort, that needsrepair is set on the
+# fs, the kernel won't mount; and that a non-injecting repair run clears
+# needsrepair and makes the filesystem mountable again.
+#
+# Repeat with the trip point set to successively higher numbers of writes until
+# we hit ~200 writes or repair manages to run to completion without tripping.
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/populate
+. ./common/filter
+
+# real QA test starts here
+_supported_fs xfs
+_require_scratch_nocheck
+_require_scratch_xfs_crc # needsrepair only exists for v5
+_require_populate_commands
+_require_libxfs_debug_flag LIBXFS_DEBUG_WRITE_CRASH
+
+rm -f $seqres.full
+
+# Populate the filesystem
+_scratch_populate_cached nofill >> $seqres.full 2>&1
+
+max_writes=200 # 200 loops should be enough for anyone
+nr_incr=$((13 / TIME_FACTOR))
+test $nr_incr -lt 1 && nr_incr=1
+for ((nr_writes = 1; nr_writes < max_writes; nr_writes += nr_incr)); do
+ # Add a tiny bit of randomness into each run
+ allowed_writes=$(( nr_writes + (RANDOM % 7) ))
+ echo "Setting debug hook to crash after $allowed_writes writes." >> $seqres.full
+
+ # Start a repair and force it to abort after some number of writes
+ LIBXFS_DEBUG_WRITE_CRASH=ddev=$allowed_writes \
+ _scratch_xfs_repair 2>> $seqres.full
+ res=$?
+ if [ $res -ne 0 ] && [ $res -ne 137 ]; then
+ echo "repair failed with $res??"
+ break
+ elif [ $res -eq 0 ]; then
+ [ $nr_writes -eq 1 ] && \
+ echo "ran to completion on the first try?"
+ break
+ fi
+
+ # Check the state of NEEDSREPAIR after repair fails. If it isn't set
+ # but repair -n says the fs is clean, then it's possible that the
+ # injected error caused it to abort immediately after the write that
+ # cleared NEEDSREPAIR.
+ if ! _check_scratch_xfs_features NEEDSREPAIR > /dev/null &&
+ ! _scratch_xfs_repair -n &>> $seqres.full; then
+ echo "NEEDSREPAIR should be set on corrupt fs"
+ fi
+done
+
+# If NEEDSREPAIR is still set on the filesystem, ensure that a full run
+# cleans everything up.
+if _check_scratch_xfs_features NEEDSREPAIR > /dev/null; then
+ echo "Clearing NEEDSREPAIR" >> $seqres.full
+ _scratch_xfs_repair 2>> $seqres.full
+ _check_scratch_xfs_features NEEDSREPAIR > /dev/null && \
+ echo "Repair failed to clear NEEDSREPAIR on the $nr_writes writes test"
+fi
+
+# success, all done
+echo Silence is golden.
+status=0
+exit