usr/src/uts/intel/zfs/spa_boot.c

   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  */
  30
  31 #include <sys/zio.h>
  32 #include <sys/spa.h>
  33 #include <sys/sunddi.h>
  34 #include <sys/x86_archext.h>
  35
  36 extern int zfs_deadman_enabled;
  37
  38 char *
  39 spa_get_bootprop(char *propname)
  40 {
  41         char *value;
  42
  43         if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
  44             DDI_PROP_DONTPASS, propname, &value) != DDI_SUCCESS)
  45                 return (NULL);
  46         return (value);
  47 }
  48
  49 void
  50 spa_free_bootprop(char *value)
  51 {
  52         ddi_prop_free(value);
  53 }
  54
  55 void
  56 spa_arch_init(void)
  57 {
  58         /*
  59          * Configure the default settings for the zfs deadman unless
  60          * overriden by /etc/system.
  61          */
  62         if (zfs_deadman_enabled == -1) {
  63                 /*
  64                  * Disable the zfs deadman logic on VMware deployments.
  65                  */
  66                 if (get_hwenv() == HW_VMWARE)
  67                         zfs_deadman_enabled = 0;
  68                 else
  69                         zfs_deadman_enabled = 1;
  70         }
  71 }