1 files changed, 85 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmp/mmp_on_uberblocks.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmp/mmp_on_uberblocks.ksh
new file mode 100755
index 000000000000..007288a78f4b
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmp/mmp_on_uberblocks.ksh
@@ -0,0 +1,85 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
+#
+
+# DESCRIPTION:
+#	Ensure that MMP updates uberblocks with MMP info at expected intervals. 
+#
+# STRATEGY:
+#	1. Set TXG_TIMEOUT to large value
+#	2. Create a zpool
+#	3. Clear multihost history
+#	4. Sleep, then collect count of uberblocks written
+#	5. If number of changes seen is less than min threshold, then fail
+#	6. If number of changes seen is more than max threshold, then fail
+#	7. Sequence number increments when no TXGs are syncing
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/mmp/mmp.cfg
+. $STF_SUITE/tests/functional/mmp/mmp.kshlib
+
+verify_runnable "both"
+
+UBER_CHANGES=0
+EXPECTED=$(($(echo $DISKS | wc -w) * 10))
+FUDGE=$((EXPECTED * 20 / 100))
+MIN_UB_WRITES=$((EXPECTED - FUDGE))
+MAX_UB_WRITES=$((EXPECTED + FUDGE))
+MIN_SEQ_VALUES=7
+
+function cleanup
+{
+	default_cleanup_noexit
+	log_must set_tunable64 MULTIHOST_INTERVAL $MMP_INTERVAL_DEFAULT
+	set_tunable64 TXG_TIMEOUT $TXG_TIMEOUT_DEFAULT
+	log_must mmp_clear_hostid
+}
+
+log_assert "Ensure MMP uberblocks update at the correct interval"
+log_onexit cleanup
+
+log_must set_tunable64 TXG_TIMEOUT $TXG_TIMEOUT_LONG
+log_must mmp_set_hostid $HOSTID1
+
+default_setup_noexit "$DISKS"
+log_must zpool set multihost=on $TESTPOOL
+clear_mmp_history
+UBER_CHANGES=$(count_mmp_writes $TESTPOOL 10)
+
+log_note "Uberblock changed $UBER_CHANGES times"
+
+if [ $UBER_CHANGES -lt $MIN_UB_WRITES ]; then
+	log_fail "Fewer uberblock writes occurred than expected ($EXPECTED)"
+fi
+
+if [ $UBER_CHANGES -gt $MAX_UB_WRITES ]; then
+	log_fail "More uberblock writes occurred than expected ($EXPECTED)"
+fi
+
+log_must set_tunable64 MULTIHOST_INTERVAL $MMP_INTERVAL_MIN
+SEQ_BEFORE=$(zdb -luuuu ${DISK[0]} | awk '/mmp_seq/ {if ($NF>max) max=$NF}; END {print max}')
+sleep 1
+SEQ_AFTER=$(zdb  -luuuu ${DISK[0]} | awk '/mmp_seq/ {if ($NF>max) max=$NF}; END {print max}')
+if [ $((SEQ_AFTER - SEQ_BEFORE)) -lt $MIN_SEQ_VALUES ]; then
+	zdb -luuuu ${DISK[0]}
+	log_fail "ERROR: mmp_seq did not increase by $MIN_SEQ_VALUES; before $SEQ_BEFORE after $SEQ_AFTER"
+fi
+
+log_pass "Ensure MMP uberblocks update at the correct interval passed"