1 files changed, 98 insertions, 0 deletions
diff --git a/usr/src/uts/common/fs/zfs/vdev_root.c b/usr/src/uts/common/fs/zfs/vdev_root.c
new file mode 100644
index 0000000000..4e44b5bb05
--- /dev/null
+++ b/usr/src/uts/common/fs/zfs/vdev_root.c
@@ -0,0 +1,98 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (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 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/fs/zfs.h>
+
+/*
+ * Virtual device vector for the pool's root vdev.
+ */
+
+static int
+vdev_root_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
+{
+	vdev_t *cvd;
+	int c, error;
+	int lasterror = 0;
+
+	if (vd->vdev_children == 0) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	for (c = 0; c < vd->vdev_children; c++) {
+		cvd = vd->vdev_child[c];
+
+		if ((error = vdev_open(cvd)) != 0) {
+			lasterror = error;
+			continue;
+		}
+
+		*asize += cvd->vdev_asize;
+		*ashift = MAX(*ashift, cvd->vdev_ashift);
+	}
+
+	if (lasterror)
+		vd->vdev_stat.vs_aux = VDEV_AUX_NO_REPLICAS;
+
+	return (lasterror);
+}
+
+static void
+vdev_root_close(vdev_t *vd)
+{
+	int c;
+
+	for (c = 0; c < vd->vdev_children; c++)
+		vdev_close(vd->vdev_child[c]);
+}
+
+static void
+vdev_root_state_change(vdev_t *vd, int faulted, int degraded)
+{
+	if (faulted > 0)
+		vdev_set_state(vd, VDEV_STATE_CANT_OPEN, VDEV_AUX_NO_REPLICAS);
+	else if (degraded != 0)
+		vdev_set_state(vd, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
+	else
+		vdev_set_state(vd, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
+}
+
+vdev_ops_t vdev_root_ops = {
+	vdev_root_open,
+	vdev_root_close,
+	vdev_default_asize,
+	NULL,			/* io_start - not applicable to the root */
+	NULL,			/* io_done - not applicable to the root */
+	vdev_root_state_change,
+	VDEV_TYPE_ROOT,		/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};