1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*
28 * Copyright (c) 2012 by Delphix. All rights reserved.
29 * Copyright 2020 Joshua M. Clulow <josh@sysmgr.org>
30 */
31
32#include <sys/zio.h>
33#include <sys/spa.h>
34#include <sys/sunddi.h>
35#include <sys/x86_archext.h>
36
37extern int zfs_deadman_enabled;
38
39char *
40spa_get_bootprop(const char *propname)
41{
42	char *value;
43
44	if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
45	    DDI_PROP_DONTPASS, (char *)propname, &value) != DDI_SUCCESS) {
46		return (NULL);
47	}
48
49	return (value);
50}
51
52void
53spa_free_bootprop(char *value)
54{
55	if (value == NULL) {
56		return;
57	}
58
59	ddi_prop_free(value);
60}
61
62void
63spa_arch_init(void)
64{
65	/*
66	 * Configure the default settings for the zfs deadman unless
67	 * overriden by /etc/system.
68	 */
69	if (zfs_deadman_enabled == -1) {
70		/*
71		 * Disable the zfs deadman logic on VMware deployments.
72		 */
73		if (get_hwenv() == HW_VMWARE)
74			zfs_deadman_enabled = 0;
75		else
76			zfs_deadman_enabled = 1;
77	}
78}
79