1 files changed, 74 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/module/zfs/uberblock.c b/sys/contrib/openzfs/module/zfs/uberblock.c
new file mode 100644
index 000000000000..b8857d74d810
--- /dev/null
+++ b/sys/contrib/openzfs/module/zfs/uberblock.c
@@ -0,0 +1,74 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2017 by Delphix. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/uberblock_impl.h>
+#include <sys/vdev_impl.h>
+#include <sys/mmp.h>
+
+int
+uberblock_verify(uberblock_t *ub)
+{
+	if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC))
+		byteswap_uint64_array(ub, sizeof (uberblock_t));
+
+	if (ub->ub_magic != UBERBLOCK_MAGIC)
+		return (SET_ERROR(EINVAL));
+
+	return (0);
+}
+
+/*
+ * Update the uberblock and return TRUE if anything changed in this
+ * transaction group.
+ */
+boolean_t
+uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg, uint64_t mmp_delay)
+{
+	ASSERT(ub->ub_txg < txg);
+
+	/*
+	 * We explicitly do not set ub_version here, so that older versions
+	 * continue to be written with the previous uberblock version.
+	 */
+	ub->ub_magic = UBERBLOCK_MAGIC;
+	ub->ub_txg = txg;
+	ub->ub_guid_sum = rvd->vdev_guid_sum;
+	ub->ub_timestamp = gethrestime_sec();
+	ub->ub_software_version = SPA_VERSION;
+	ub->ub_mmp_magic = MMP_MAGIC;
+	if (spa_multihost(rvd->vdev_spa)) {
+		ub->ub_mmp_delay = mmp_delay;
+		ub->ub_mmp_config = MMP_SEQ_SET(0) |
+		    MMP_INTERVAL_SET(zfs_multihost_interval) |
+		    MMP_FAIL_INT_SET(zfs_multihost_fail_intervals);
+	} else {
+		ub->ub_mmp_delay = 0;
+		ub->ub_mmp_config = 0;
+	}
+	ub->ub_checkpoint_txg = 0;
+
+	return (ub->ub_rootbp.blk_birth == txg);
+}