generic: run a long-soak write-only fsstress test

Let a lot of writes soak in with multithreaded fsstress to look for
bugs and other problems.

[eguan: remove '-v' option of fsstress and remove 'clone' group]

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

tests/generic/476

@@ -0,0 +1,64 @@
+#! /bin/bash
+# FS QA Test No. 476
+#
+# Run an all-writes fsstress run with multiple threads to shake out
+# bugs in the write path.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+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.*
+	$KILLALL_PROG -9 fsstress > /dev/null 2>&1
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+
+_require_scratch
+_require_command "$KILLALL_PROG" "killall"
+
+rm -f $seqres.full
+
+echo "Silence is golden."
+
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+nr_cpus=$((LOAD_FACTOR * 4))
+nr_ops=$((25000 * nr_cpus * TIME_FACTOR))
+$FSSTRESS_PROG $FSSTRESS_AVOID -w -d $SCRATCH_MNT -n $nr_ops -p $nr_cpus >> $seqres.full
+
+# success, all done
+status=0
+exit

tests/generic/476.out

@@ -0,0 +1,2 @@
+QA output created by 476
+Silence is golden.

tests/generic/group

@@ -478,3 +478,4 @@
 473 auto quick
 474 auto quick shutdown metadata
 475 shutdown auto log metadata
+476 auto rw